Some of Mr Annan's American critics called for his removal as secretary-general and cast around for sticks to beat him with.
一些美国批评家要求他辞职，并且乘机攻击安南。
2
Cyclic Activated Sludge Technology (CAST) is a viable choice for large-scale municipal wastewater treatment, particularly when nutrient removal is of a major consideration.
循环式活性污泥法对大型城市污水处理尤其在要求深度去除氮磷时，是一种非常高效经济的工艺方法。
3
Another method of shadow removal based on edge information is presented too, which is independent of the direction of shadow, and can effectively remove the cast shadow of a moving object.