Nilpotency
幂零性
🗣️ 情景例句
Can I call you sometime?
我能给你打电话吗？
The bigger one.
大些的那个。
The city was equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.
城里甚至还敷设了排水系统，因为在狭窄的街道底下发现了许许多多陶土制作的排水管道。