1、Mommy, you don't need to stay while we talk.妈妈,我们谈话时你不必陪着. 2、While in Vienna he studied music.他在维也纳时学习音乐。 3、While he was eating, I asked him to lend me $2.当他正在吃饭时,我请他借给我二英镑。 4、While two detectives...