同义词： understudy standby
同义词： understudy alternate
以上来源于: WordNet
N-COUNT An actor's or actress's understudy is the person who has learned their part in a play and can act the part if the actor or actress is ill. 替角
He was an understudy to Charlie Chaplin on a tour of the U.S.
他曾是查理•卓别林美国巡演的替角。
Its use in the treatment of depression remains under study.
另一项研究正研究圣约翰草对治疗中到轻度抑郁的有效性。
Until now, the rats under study have met two of the three elements of addiction.
直到现在，研究中的大鼠符合成瘾三要素当中的二项。
New treatments with reduced risks during pregnancy and lactation are under study.
新的怀孕和哺乳期过程中低风险的治疗方案正在研究中。
In the study, scientists placed highly sensitive measuring equipment two hundred to two hundred seventy meters under the ocean's surface.
VOA: special.2009.07.07
My mother always told me, if you study hard, the answers should be right under your nose or easily seen.
VOA: special.2009.09.13
Women,adults under the age of 55 and less educated people in all the countries included in the study reported low satisfaction with health care access.
VOA: standard.2010.04.18
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