Ditan
二苯基甲烷
🗣️ 情景例句
I worked to put together a book of photographs.
我的工作是创作出一本摄影书。
You'll drop it, if you don't teke care.
你不专心的话，就会掉下。
One, for instance, consisted of rods of various lengths and thicknesses which would stand up on end like ninepins.
例如，有一种装置是由一些长短、粗细不同的木棒组成；就像九柱戏的木棒一样竖立着，