Biotoxin
生体毒素
🗣️ 情景例句
Australia is a unique country.
澳大利亚是世上独一无二的国家。
The first step to virtue is to abstrain from vice.
不作恶是走向美德的第一步。
A lot of things can change over twenty-one years.
21年了，许多东西都可能改变的。