| 单词 | involuntary contraction |
| 释义 | involuntary contraction Acetylcholine concentrations then increase at neuromuscular junctions to cause involuntary contraction of all muscles. Retrieved from Wikipedia CC BY-SA 3.0 Tics are rapid, repetitive, involuntary contractions of a group of muscles that can be mild and infrequent or frequent and severe, as in the case of your daughter's cough. Times, Sunday Times The first stage starts with a series of involuntary contractions of the muscular walls of the uterus and gradual dilation of the cervix. Retrieved from Wikipedia CC BY-SA 3.0 |
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