When the worm is prodded, stretching the structural proteins in muscle fibers, the linking spring is stretched, and the worm fluoresces in a different color.
蠕虫受刺激时，肌纤维结构蛋白被拉伸，其连接弹簧也被拉伸，蠕虫的荧光颜色发生改变。
The horses, feeling slack reins, stretched down their necks to crop the tender spring grass .
那几匹马觉得缰绳放松了，便都低下头去嚼那柔嫩的春草。
The ends of the spring are affixed to the frame rails while the springs are in an un- stretched state.
当弹簧在未拉伸状态时，将弹簧的端部固定在框架横 杆上。
The ends of the spring are affixed to the frame rails while the springs are in an un- stretched state.
当弹簧在未拉伸状态时，将弹簧的端部固定在框架横 杆上。
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