名词
中文翻译：自发收缩
同义词：
['spontaneous contraction', 'spontaneous contraction', 'spontaneous contraction']
例句：
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1. The musclespasms were caused by a sudden increase in blood pressure.
肌肉痉挛是由于血压突然升高引起的。
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2. The heart's spontaneous contractions are essential for the body's circulation.
心脏的自发收缩对于血液循环至关重要。
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3.During the spontaneous contraction of the diaphragm, the lungs fill with air.
在膈肌自发收缩期间，肺部充满了空气。