vt. protract
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左臂继续前伸，头右转并且拉伸。
Left arm continues to extend forward, while the head rotates right and extends.
youdao
评估柔韧性：屈体前伸测试。
Assess your flexibility: Sit-and-reach test.
左臂前伸的同时头向右转回。
The head rolls back to the right as the left arm recovers.
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