While doing tuck jumps, put your arms out straight in front of you and pull your knees up as you jump, trying to touch them to your hands.

做塔克跳跃时，把你的手臂直接放在你的面前，当你跳起来的时候把你的膝盖抬起来，让它们触摸到你的手。

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Single head cam system, tuck cam both in front and rear meddle beds, car has high-butt and low-butt select function, controlled by step-forward motor .

单头三系统，前后针床皆可中山吊目，三角具有高低脚针选择功能，皆采用步进马达驱动。

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Lastly tuck in the khukuri completely and firmly push the blade forward against the front edge of the scabbard and then store in a cool dry place for few days.

最后，用刀刃用力撞几下刀鞘的前缘，之后在阴凉干燥处放几天。

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However, Maisel said pacemaker and defibrillator patients shouldn't tuck them in their front pockets, drape them over their shoulders or allow a loved one to rest his head on their stomach while mellowing out and listening to an iPod.

CNN: Study: Headphones could interfere with pacemakers

If you can tuck in behind the rider in front you can gain an advantage.

BBC: England