Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
I'd like to keep her, too.
我也愿意收留她。
A chance may come up soon.
一个机会可能会很快出现。
They will hardly know which facts to select from the great mass of evidence that steadily accumulates.
对于逐渐积累起来的庞大材料，他们几乎不知道选取哪些好，