Septavalency
(=septavalence)[化]七价
🗣️ 情景例句
sacrifices have to be made by one partner from time to time.
总要有一方必须不时做些牺牲。
The mills of God grind slowly but sure.
天网恢恢，疏而不漏。
The ice is hard enough to skate on.
冰已经厚得可以划冰了。