Billisecond
毫微秒(十亿分之一秒)
🗣️ 情景例句
You'll have to come and see us soon.
你一定要再来看我们。
This round table weighs about forty-five pounds.
这张圆桌子重大约45磅。
Yes. I don't think it's necessary to buy the bigger one.
有哇。我认为没必要买较大的机子。