Valerolactam
戊内酰胺
🗣️ 情景例句
About one month. I'm just sightseeing.
大约一个月。我只是观光旅游。
It is our permanent principle that contracts are honored and commercial integrity is maintained.
重合同、守信用是我们的一贯原则。
A navy ship was in a port in Scotland for repairs.
一艘军舰停靠在苏格兰的一个码头等待维修。