In one sentence, describe what the following article is about: U-pins are also called hair pins. They are like bobby pins but open and shaped like a letter U. You will need lots of them. You can find U-pins at a beauty supply shop or online.  If you absolutely cannot find any U-pins, get some stiff wire and cut it to twice the length of your finger. Fold it in half until a narrow U-shape. It should be no wider than your finger. Do not use bobby pins; they will not work for this method. Use a lightweight styling mousse on clean, straightened, tangle-free hair. Your hair must be brushed, or it will turn out frizzy. It might also be a good idea to straighten it first; this will also help reduce frizz. The styling mousse is especially important for those with naturally-straight hair, or for those whose hair can't hold a curl easily. Pull three-quarters of your hair up into a loose bun at the top of your head. The bottom fourth of your hair should be hanging loose around your shoulders. You will be working on this section first. The section should be about 1 inch (2.54 centimeters) wide, and 1 inch (2.54 centimeters) tall. Bring the curved part of the pin as close to your scalp as possible. The closer the pin is to your scalp, the more volume you will get. Start wrapping the hair around the two prongs until you reach the end of your hair. Weave the hair in and out of the prongs in figure-rights. When you reach the end, consider wrapping a small hair elastic around the ends of the U-pin. This will help pinch the pin closed, and prevent your hair from unraveling. Work in 1 inch (2.54 centimeters) sections. For more holding power, you can also add a little bit of hairspray as well. Do not use a high heat setting. Start ironing from the ends of the U-pin first, and work your way towards your roots. Only clamp the straightener down five seconds at a time. Repeat the sectioning, weaving, and straightening process for the next three layers. When you are done, you should have no hair left to weave. You should have four rows of hair-wrapped U-pins. Make sure that you spray and "straighten" each row before starting on the next. If you remove the U-pins too soon, your hair will not hold its crimp. This will take about ten minutes or so. Start from the bottom layer first. Pull off the hair tie, but don't unravel the hair. Instead, pinch the curved part of the U-pin, and simply pull it out of your hair. If you do, your hair will turn frizzy. If the crimps are too tight for your liking, you can loosen them by running your fingers through your hair.
Summary: Get some U-pins. Apply a styling mousse. Twist most of your hair into a bun. Take a small section of hair, closest to your face. Place the section inside the pin. Wrap your hair around the prongs. Repeat the process for the rest of the bottom layer. Lightly mist the hair-covered U-pins with a heat protecting spray. Set your hair straighten to medium and go over the hair-wrapped U-pins. Continue working your way through your hair. Let your hair cool down. Remove the U-pins. Avoid brushing your hair.

Carefully observe the professionals and see what techniques they use. You can also watch video clips of expert bowlers online. Try to imitate the bowler's stances in your own home. Just remember that you're watching experts, and that your bowling technique will be much simpler than theirs. If you want to really improve your game, seek out help from other, more advanced bowlers and from coaches.  It will always help to have a critical eye watching you and you will gain new insight. This is a great way to keep up a regular practice and to make new friends.
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One-sentence summary -- Watch bowling on TV. Ask for advice. Join a bowling league.

Q: You should fill it about halfway, if not a little higher. A simple syrup is nothing more than a combination of equal parts granulated sugar and water, heated together until the sugar dissolves. Simple syrups are great for reducing the bitterness of alcohol and extremely sour juices. Pour all three liquids into your shaker and over the ice before securing the cap. The ice in the shaker not only cools the cocktail but also helps to combine the syrup into the alcohol and the juice. Continue shaking using your dominant hand, pointing the lid of the shaker away from you and anyone else, for 15 to 30 seconds. The strainer built into your shaker should suffice, but you can also double-strain your gin sour by pouring the liquid through a separate cocktail strainer, as well.
A: Fill the shaker with ice. Pour the gin, lemon juice, and simple syrup into the shaker. Shake vigorously. Strain the drink into a cocktail glass.

Problem: Article: Poor eyesight is typically genetic. So if both of your parents wear glasses, it is reasonable to assume you'll need them eventually too. Keep this in mind as you consider whether or not you need glasses. Ask your family members how old they were when they first started wearing glasses. Think about whether or not your vision seems to have changed over the years. Do you have more trouble viewing specific things than you did in the past? This is a sign that you need glasses. Specifically consider whether you have trouble viewing things that are far away or that are up close, as these are the two biggest problems with eyesight that people typically have. The ultimate way to determine whether or not you need glasses is to get an official eye examination from a licensed optometrist. They will perform tests on your vision and on your eyes in general to determine if glasses are a necessity for you. An optometrist, in addition to whether or not you need glasses, will also be able to tell you if there are any medical problems with your eyes.
Summary:
Consider your family history. Consider your vision. Consult an optometrist.