There are several reasons some mothers may not be able to breastfeed.一些母亲不能够提供母乳喂养的原因有很多.It also lets the baby breastfeed at any time.也可以在任何时候哺乳幼仔.If you are not planning on breastfeed, you have to decide on a formula.如果...
这样，其成员就可以不必诉诸战争来解决分歧。It enabled its members to settle their differences without recourse to war.他们准备诉诸暴力来捍卫自己的信仰.They are prepared to resort to violence in support of their beliefs.采取外交手段胜于诉诸战争。Diplomacy is better than w...
氨的合成主要经过四道工序.There are four major steps in ammonia synthesis.试计算氮在尿素及硫酸氨的质量百分率.Calculate the percentage by mass of nitrogen in urea and ammonium sulphate.这种肥料经过化验表明氨的含量很高.Tests of the manure showed a high ammonia content...