contractions
n.
收缩( contraction的名词复数 );
缩减;
缩略词;
（分娩时）子宫收缩;
例句:
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Contractions of the uterus can be a confusing sign.
来自BBC
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The figure will undergo most curious elongations and contractions.
来自D. Brewster
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Foods and fluids are mixed in the stomach by its muscular contractions.
通过胃部肌肉的收缩食物和流质在胃中混合。
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Contractions are much more common in speech than in writing.
缩略词在口语里比在书写中常见得多.
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Muscle contractions are powered by the chemical adenosine triphosphate ( ATP ).
肌肉收缩是由化学物质三磷酸腺苷 ( ATP ) 提供动力的.
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How to tell it's labour Time your contractions.
来自BBC