arms bent meaning in English

屈臂

Double arm bent with a wide & deep position , and thumbs come forward under water , right up the should line , stable elbows and standing back to bottom of the stroke without push deep
双臂展开至一个较宽和较深的位置，手（拇指贴水面）在水底向前推至肩线，保持稳定的肘部，而不要推得太深。
It sounds counter intuitive , but an important thing to remember on descends is to relax , try to be fluent with your movements , if you are relaxed , with your knees and arms bend , you help the tires stay in contact with the ground for more control of braking traction
这听起来跟你的直觉相反，可是有个很重要的一点是下坡时记得要放松，试着流畅的动作，如果你放松骑而且弯曲你的膝盖和手臂，轮胎会保持接触地面让你更好控制煞车的抓力。