Haloflex
氯化聚乙烯
🗣️ 情景例句
During that time
在那一小时
They must hunger in frost that will not work in heat.
少壮不努力，老大徒伤悲。
(A light year is the distance which light travels at 186,000 miles per second in one year,
一光年是光以每秒186，000英里的速度在一年内走的距离，