Diethylacetylene
[化] 二乙基乙炔
🗣️ 情景例句
Blackjack.
二十一点！
Smooth water runs deep.
大智若愚。
When you think of the innumerable birds that one sees flying bout,
你可以想象出天上有看得见的飞来飞去、数不清的鸟，