Picomole
n. [化]皮(可)摩尔,微微摩尔,百亿分之一摩尔
🗣️ 情景例句
She was kicked out of the university.
她被大学开除了。
I'm pressed for time.
我时间紧迫。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。