To raise the success rateofopening and closing the two-stage cementing tool, Model dsg-a cementing tool is developed.
为提高现有双级注水泥器打开和关闭的成功率，研制了DSG—A型系列双级注水泥器。
2
Meanwhile, chain pubs and café-bars are opening at a rateof two a week.
与此同时，连锁酒吧和咖啡酒吧的数量以每周两家的速度增加。
3
“The World Is What It Is” (the severe opening words of “A Bend in the River”) is fully worthy of its subject, with all the dramatic pacing, the insight and the pathos of a first-rate novel.
这本《如此人 世间》（The World Is What It Is：取自奈保尔小说《河湾》严厉的开场白），完全是典型的奈保尔风格，紧张戏剧性的节奏，一流小说的深刻洞察和感伤悲悯。