题目内容
羊水过多是指在妊娠期内羊水量超过
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n. an act of moving your hand gently over a surface, usually several times; a mark made by moving a pen, brush, etc. once across a surface
a. (of a person) good at doing sth. especially sth. that needs a particular ability or special training
n. the quality or state of being steady and not changing or being disturbed in any way
n. a strip of leather, cloth or other material that is used to fasten sth. , keep sth.in place, carry sth. or hold onto sth.
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