1.This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

1.离子交换剂在萃中得到了广泛应用，本文详细总结了离子交换剂在化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素离与测定。

2.The problem of collecting and delivery shunting of non-through wagon flow on the actinoid private line belongs to a kind of the combinatorial optimization problems.

2.放射形专用线非直达车流送车问题属于一类组合优化问题,影响因素较多。