Samiresite
铅铌钛铀矿
🗣️ 情景例句
I'm not sure I'm up to it.
我不能肯定我是否能做得来。
To have money is a fear, not to have it a grief.
有钱使人担心，没钱使人伤心。
The body's tissues are self-repairing and self-restoring to a degree, and function best when more or less continuously active.
人体组织在一定程度上有自我修补和自我恢复的能力，有张有弛地连续活动时，其功能最佳。