Racemize
v. [化] 外消旋
??? 情景例句
I just don't know what to say.
我真不知該說什么好。
A man of words and not of deeds is like a garden full of weeds.
一個只說不做人就像一個長滿野草的花園。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走過一個波長所需的時間）。