understudying的读音 understudying中文意思

读音 
v. 练习做临时演员( understudy的现在分词 )
understudying 用法和例句
He is understudying the famous film star .
他在为那位著名影星充当替角。
Understudying ingrid was guaranteed unemployment .
为英格丽当替角是注定要失业的。
But carbon fiber , which is used only sparingly now because of its cost and complexity , is understudying for a larger role .
由于碳纤维的高成本和复杂性,因此宝马对它的使用还比较谨慎,但它未来必然会在宝马汽车上扮演更大的角色。