我的胳膊很累,背部肌肉紧绷得难受。My arms are tired, and my back is tense.长牙会很难受,婴儿会烦躁不安。Teething can be painful and make your baby irritable.世上最让人难受的莫过于小婴儿遭到遗弃。The saddest thing in the world is a little baby nobody wants....
The content of ephedrine hydrochloride was determined by HPLC.采用高效液相色谱方法测定盐酸麻黄碱的含量.Departments of public health must enhance control over prescribed ephedrine preparations.卫生部门要加强对麻黄素单方制剂的管理.No other units or individuals...
Silver azide does not dissolve in water or in nitric acid.叠氨化银不溶于水或硝酸.It is possible to harness the versatile chemical properties of cyanogen azide.氰化叠氮的灵活多变的化学性质是可控制的.Cupric azide is insoluble in water.叠氮化铜不溶于水....