Ditan
二苯基甲烷
🗣️ 情景例句
Is everything OK?
一切都好吗？
Don't halloo till you are out of the wood.
没有脱离危险不要先欢呼。
What about your inside pocket? Maybe you put it there.
里面的口袋呢？或许你把它放在那儿了。