Pentavalency
五价
🗣️ 情景例句
I'm dieting to keep my figure.
我正在节食以保证身材。
See you later.
待会见。
This time they fixed heavy metal clamps to both sides of the dish so that they could fasten the chains.
这次，他们用沉重的金属夹子把盘子夹住，以便往盘子上安装铁链。