Cariogenicity
生龋性
🗣️ 情景例句
It's the way it should be.
本该如此。
When the tree is fallen, every one runs to it with his axe.
大树一倒下，人人持斧来。
and the more difficult it is, the more highly it is regarded.
他们认为， 道路愈艰险愈带劲儿。