例句與造句

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，上臂轉一半，然后屈肘使身體轉動達到一個高肘位置接著重新入水并使前臂和手掌通過抱水能夠產(chǎn)生向前的推進力。
2. It's difficult to find drag surface in a sentence. 用drag surface造句挺難的