Kettering
n. 凯特灵（姓氏）
🗣️ 情景例句
Chairman Mao said it is necessary to drill as much as possible.
毛主席说，反复操练是非常必要的。
What's done by night appears by day.
若要人不知，除非己莫为。
I don't doubt that he will help me.
我不怀疑他会援助我。