Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
And miles to go before I sleep.
在我就寝前还得赶许多哩路。
It is never too late to learn.
什么时候学习都不晚。
everybody,that is, except his six-year-old daughter, Jenny.
就是说，除他6岁的女儿珍妮之外的每一个人。