Quatenary carbon atom
[医] 第四碳原子, 季碳原子
🧩 词语组成解析
🗣️ 情景例句
Can I speak with Mr. or Mrs. Anderson?
我可以跟Anderson先生或太太说话吗？
Eye for eye and tooth for tooth.
以牙还牙，以眼还眼。
There has long been a superstition among mariners that porpoises will save drowning men by pushing them to the surface, or protect them from sharks by surrounding them in defensive formation.
长期以来，海员中流传着一种迷信的说法，认为海豚会把快要淹死的人托到水面，救人性命；或在人们周围列队保护，使他们免遭鲨鱼伤害。