Ditan
二苯基甲烷
??? 情景例句
It's easy to pick something for my colleagues, but it's difficult for my boss.
給同事們的應該不難買，但是給老板的就難羅。
We should take due care for this accident.
我們應該對這件事給予應有的注意。
I'm a farmer.
我是一個農民。