Pentaborane
n. [化]戊硼烷(用作火箭推进剂)
🗣️ 情景例句
You know, man's best friend is his dog.
你知道的，类最好的朋友就是狗。
I don't feel up to going to work today.
我今天不舒服，不能上班。
In the back row.
教室后排。