Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
We had a great time, Mom.
我们玩得非常开心，妈妈。
That deep sigh could only express Helen's sadness.
那深深的叹息，不外乎表示出海伦的悲哀。
he stooped to talk to a workman.After they had gone on,
途中，停下来与一个工人交谈，接着他们继续往前走去。