Milligamma
毫微克, 10的-9次方
🗣️ 情景例句
I was very sad indeed to hear about it.
听了这件事，我的确非常难过。
How old are you?
你多大了？
What is worth doing is worth doing well.
只要你觉得某事值得去做，就一定要把它做好。