Polynonanoylamide
[化] 聚壬酰胺; 尼龙-9
🗣️ 情景例句
He won't come until next week.
他下星期才会来。
What makes life dreary is the want of motive.
没有目的，人生就黯淡无光。
but more often than not, the greater part of the journey is spent on roads with few service stations and too much traffic.
但旅行的大部分时间都花在路上，而且只有很少的服务设施，交通也很拥挤。