Tetrahydroxy
a. [化]四羟(基)的
🗣️ 情景例句
Smoking makes your teeth yellow and ugly.
吸烟让你的牙齿变得又黄又丑。
What's the purpose of your visit?
你旅行的目的是什么？
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。