Understudying
v. 練習(xí)做臨時演員( understudy的現(xiàn)在分詞 )
??? 情景例句
He just loves that teddy bear
他就喜歡這個玩具熊
It's easy to fall into a trap, but hard to get out again.
墮入陷阱易，脫離陷阱難。
I think it's under the table.
我想可能在桌子底下。