Quadridentate ligand
[化] 四齿配位体
🧩 词语组成解析
a. （有）四齿的
[化] 配体; 配基
🗣️ 情景例句
No, these are only personal effects.
没有，这只是些私人用品。
Could you take a picture for me?
你能帮我拍照吗？
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。