空气中所含的氮的比例是多少?What is the percentage of nitrogen in air?作物收获后, 他测定了作物中氮的含量.After harvesting the crops , he tested them for nitrogen content.不含碱性氮的化合物包括吡咯 、 吲哚 、 咔唑和苯咔唑.Non - basic nitrogen - containing series include pyr...
在分析实现这个以市场为导向的战略转变的关键问题时，涉及了诸多领域。A lot of ground has been covered in unpacking the issues central to achieving this market-led strategic change.使用目标导向的思维方式, 我们可以研究每个功能使之达到最好的效果.Using goal - directed thinking, we can exam...