Pentaborane
n. [化]戊硼烷(用作火箭推进剂)
🗣️ 情景例句
Let's drill them in English pronunciation.
我们来给他们做英语发音练习。
Nothing is so certain as the unexpected.
天有不测风云，人有旦夕祸福。
Can I have some breakfast first
我能先吃点早餐吗？