Weissite
碲铜矿
🗣️ 情景例句
Permanently?
一直住下去？
Could you tell me where I can find these books?
您能告诉我在哪儿能找到这些书吗？
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。