Thrombon
成血小板物質(zhì)
??? 情景例句
in the public school
在公立學(xué)校中
The passengers were scared to death as the taxi whizzed along.
出租車(chē)風(fēng)馳電掣般地駛著，乘客嚇得要命。
What are these?
這些是什么？