Perforations
n. 穿孔( perforation的复数形式 ); 贯穿; 针孔; 齿孔
🗣️ 情景例句
We will also need a letter of recommendation.
我们还要求一封推荐函。
Do you think you could keep the noise down?
你看能不能小声一些？
Porpoises and sharks are natural enemies.
海豚和鲨鱼是天然仇敌，