Derivations
n. 发展( derivation的复数形式 ); 起源; 派生; 词源
🗣️ 情景例句
I think I can stay at home
我觉得我可以待在家
It's a long story.
说来话长。
Porpoises and sharks are natural enemies.
海豚和鲨鱼是天然仇敌，