机械设计中有一个“等强原则”,即设计一个机械零件要使每一个部分强度相等,这样才不会因一个部分先报废而使其它完好的部分浪费。“等强原则”所蕴含的经济生活道理是 ( )
— What about playing football this afternoon, Sam? — I would rather at home than football. It’s too hot outside.
After the discussion, the students asked their teacher next.
If the teacher us any homework tomorrow, we will go bike riding.
— Come and join us, Jimmy! — I’m sorry, but I’m really busy now. If I time, I would certainly go.
— Is she really ill? — . She’s in hospital.