Billisecond
毫微秒(十亿分之一秒)
🗣️ 情景例句
Great! Let's do it!
好。 我们去。
They used to live there, didn't they?
他们过去住在哪里，不是吗？
I'm afraid this green dress it too small for me as well.
恐怕这件绿色的我穿着也太小了。