这些课不是硬性规定要听的。Attendance at these lectures is not compulsory.参加晚祷并非硬性规定.Attendance at evening prayers is not compulsory.高水材料是一种新型水硬性无机胶凝材料,水灰比高达3.0.The material with high water is a new water - hardening inorganic gelling...
A high turnout was reported at the polling booths.来自投票站的消息称投票率很高。He reported that two suspicious-looking characters had approached Callendar.他报告说两个形迹可疑的人曾跟卡伦德接触过。Attacks were reported on police, vehicles and commercial p...