并对此方法从拖拉机所有者追求经济利益的角度，确定了大修制拖拉机最佳更新期与合理更新期的经济界限。

Then, both optimal and rational renewal cycle under different conditions were analyzed from the viewpoint of optimizing the economical benefit of the tractors owners.

youdao

点警制是新生制度，目的为提高办案效率，却混淆了权力与权利的界限。

The newly born "system of selecting policemen" aims at raising the efficiency of handling cases, but it confuses the bounds of power and rights.

youdao

点警制是新生制度，目的为提高办案效率，却混淆了权力与权利的界限。

The newly born "system of selecting policemen" aims at raising the efficiency of handling cases, but it confuses the bounds of power and rights.

youdao