Pentaborane
n. [化]戊硼烷(用作火箭推进剂)
🗣️ 情景例句
And there's so much to do.
而且这里总是有许多事可做。
You were late again this morning. I think you had better start being on time.
你早晨又迟到了，我想你最好开始守时。[托福]
That is perhaps why sculpture has been described as the most difficult of all arts;
雕塑被说成是所有艺术中最难的艺术，可能就是这个道理。