我用拇指指甲把台灯上的螺钉拧紧了。I used my thumbnail to tighten the screw on my lamp.把盖子拧紧。Screw down the lid fairly tightly.所有的螺钉都拧紧了。All the bolts were fully tightened....
Prospect Park, with its vast lake, is a magnet for all health freaks...拥有一大片湖区的普罗斯佩克特公园吸引着所有注重健康的人。Certain metals are attracted to a magnet.某些金属受磁石的吸引。The earth may be thought of as a gigantic magnet.整个地球可以想像为一块硕大无朋的磁石.F...
采用半连续乳液聚合的方法合成聚醋酸乙烯乳液.Polyvinyl acetate emulsion was synthesized by semi - continuous emulsion polymerization method.最终描绘出了阴离子分散聚合的粒子形成过程.In the end, the particle formation process was pictured.乳液聚合的主要组分为单体 、 水 、 引发剂等.Th...