Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
We'll have a great time camping out, I'm sure.
我确定我们会在露营时玩得很开心。
It seems what he said is true.
看起来他说的好像是真的。
Is this a rush order?
这批货急吗？