Then, we also have an electrical motor over here that controls this transmission that you can see that controls flexion and extension of the elbow.
之后，我们这里还有一个电机，它控制这个传输，你可以看到它控制肘部的弯曲和伸展。
| 单词 | flexion and extension |
| 释义 |
flexion and extension
原声例句
Discovery纪录片《认识电力》 Then, we also have an electrical motor over here that controls this transmission that you can see that controls flexion and extension of the elbow. 之后，我们这里还有一个电机，它控制这个传输，你可以看到它控制肘部的弯曲和伸展。 |
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