Milligamma
毫微克, 10的-9次方
🗣️ 情景例句
And if I think about it long enough, you never know ...
如果我一直考虑下去的话 ，说不定……
I tried to call you, but the line was busy.
我试着给你打电话，但老占线。
I'm sorry,I'm don't know.
很抱歉，我不知道。