Pentaborane
n. [化]戊硼烷(用作火箭推进剂)
🗣️ 情景例句
There are so many things to consider. There's Michelle.
要考虑的事太多了。首先是Michelle。
Turn down the radio please.
请放低音量。
It was the last day of the year and a large crowd of people had gathered under the Town Hall clock.
那是一年的最后一天，一大群人聚集在市政厅的大钟下面。