n. (植物的)溃疡;(动物)耳溃疡;腐败的影响;腐蚀因素;
vt. 使溃疡;
vi. 受到腐蚀,生黑腐病,溃烂;
🗣️ 情景例句
No, I'm not kidding.
不, 我不是说笑。
I'm going to show him how to cook.
我正要指点他如何做饭。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.