Ooa
面向对象分析
🗣️ 情景例句
Good-bye. Take care of yourself.
多多保重，再见。
Don't forget to take care of him.
不要忘记照顾他。
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。