The boy first showed promise as an athlete in grade school.这个男孩在上小学的时候就初次显示出成为运动员的潜力。South Point College does not grade the students' work.南点学院不对学生的作业评分。It was actually used for enriching uranium to weapons-grade le...
The nano filtration membrane is composed of nanometer grade micropore capillary tube bundles.所述的纳滤膜是由纳米级微孔毛细管束构成.I flunked math in second grade.我二年级时数学不及格。The front end is equipped with hydraulic jacks used for grade adj...