Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
They live from hand to mouth.
他们过着糊口的生活。
Please don't bother me now.I'm very busy.
现在请别麻烦我，我很忙的.
The pilot managed to circle the balloon for some time.
飞行员设法绕着气球飞了一阵。