drag surface造句

例句与造句

1. An elevation of the shoulder , medial rotation of the upper arm , and late flexion at the elbow as the body rotates to accommodate an " elbows - up " position and to reposition the forearm / hand drag surface to where forward propulsion can be created
   提肩，上臂转一半，然后屈肘使身体转动达到一个高肘位置接着重新入水并使前臂和手掌通过抱水能够产生向前的推进力。
2. It's difficult to find drag surface in a sentence. 用drag surface造句挺难的