Absite
钍钛铀矿
🗣️ 情景例句
Bye-bye, Alexandra. Thanks.
再见 Alexandra 谢谢。
Jeff was not pleased with his school grades.
杰夫不满意自己在学校的成绩。
Once the existence of this wave-length had been discovered,
一旦这种波长的实际存在被发现，