钎焊铜及铜合金 、 银、钼等金属.Brazing of copper, copper alloys, silver and molybdenum etc.黄铜和青铜是两种广泛使用的铜合金.Two widely used alloys of copper are brass and bronze.研究了ICP -AES 法测定铜合金中微量硅的最优化条件.The conditions for determination of Si in C...
他一心一意致力于早日让被压迫者获得自由。He was single-mindedly devoted to the hastening of freedom for the oppressed.坐着或者走路的时候低头垂肩，这种不正确的姿势会压迫体内的器官。Poor posture, sitting or walking slouched over, compresses the body's organs.压迫和暴政的受害者a...
The artificial sweetener sorbitol has a laxative effect...人工甜味剂山梨糖醇有通便作用。Some laxative drugs such as magnesium sulfate , Bisatin, phenolphthalein, glycerol etc for common use were introduced.介绍了几种治疗慢性便秘的药剂,包括:硫酸镁, 比沙啶,酚酞...