Pentaborane
n. [化]戊硼烷(用作火箭推进剂)
🗣️ 情景例句
Where's the dairy food section?
奶制品在什么地方？
A good face needs no paint.
美貌无需擦脂抹粉。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。