I've been doing this job for 25 years, and I tell you you're going to stuff it up doing things this way.
我干了这工作已有25年了,告诉你,你这样做事情,会把事情办糟的。
One would expect them to know their parts by heart and never have cause to falter.
人们以为,这些演员一定会把台词背得烂熟,绝不会临场结巴的,