The dustless chalk is of good quality, go and get some more.这批无尘粉笔的质量不错, 再去买一些吧!The characteristics of dustless compouded lead salt stabilizer are good, and without dust poison.无尘复合铅盐稳定剂性能优良, 无粉尘毒害....
The gas , which is sulphur - free , contains 89 - 99 % methane, up to 6 % ethane, and 3 % propane.天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.The method and the condition of separation epoxy ethane from dihydric alcohol are described.介...
They were found guilty of acts of gross indecency.他们因存在严重猥亵行为而被判有罪。It would be wrong to suggest that police officers were not annoyed by acts of indecency.要是认为警官对粗鄙行为不气不恼，那可就错了。For a moment she suspected herself of havin...