Cooedinate bond
[机] 池配位键
🧩 词语组成解析
🗣️ 情景例句
who really needs to be wearing a tuxedo,
真正需要穿燕尾服的人，
There are as good fish in the sea as ever came out of it.
海里的好鱼是取之不尽的。
many of them serious and senior scientists---- who dream of sending people to it.
其中的不少人是认真和资深的科学家，他们一直梦想着把人送上火星。