straight wrist的意思|示意

Keeping the left elbow straight, slowly bend the left wrist upward until you feel a stretch.

保持左手臂伸直，慢慢地把左手腕朝上弯曲直到感到拉力。

In order not to let the wrist flexion, can put a support at the bottom of the wrist to keep the wrist straight position.

为了不让腕部过度弯曲，可以在手腕下方放一个支撑物来保持腕部的平直位置。

You should hold your arm and wrist straight. If you don't have a solid wrist, you will never be able to control the ball.

你应该保持胳膊和手腕笔直。如果手腕不稳固，你就没法控制球。