Piperazin
n. 哌嗪
🗣️ 情景例句
This is the last chance you can get up to 60 percent discount.
这是您可以得到6折的最后机会。
Thrift is good revenue.
节约是个好收入。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？