Alkanes are resistant to attack by oxidizing agents generally.烷烃一般对于氧化剂的作用是稳定的.The general uses of alkanes may be divided into three categories.烷的一般用途可分为三个方面.The straight - chain alkanes exacerbate the problem of engine ...
Each firm will face a downward-sloping demand curve.每一家企业都将面临需求曲线的下滑。the downward slope of a hill向下的山坡My career seemed to be on a downward trajectory.我的事业似乎在走下坡路。...