Fluoridizer
氟化劑, 氟化器
??? 情景例句
Let me give you a little fatherly advice.
讓我像父親般給你提點(diǎn)建議。
Lazy folks take the most pains.
懶漢多吃苦。
In his own lifetime Galileo was the centre of violent controversy;
伽利略在世時(shí)是激烈論戰(zhàn)的中心。