management at different levels的用法和樣例：
例句
- The tiered management of sluices shall be determined in project filing of sluice construction.
水閘的分級管理，在水閘建設立項時(shí)予以確定。 - Dumping wastes into the sea shall follow a graded management based on the categories and quantities of the wastes.
向海洋傾倒廢棄物，應當按照廢棄物的類(lèi)別和數量實(shí)行分級管理。
