placing depth的用法和樣例：
例句
- Determining optimal space and depth of the subsurface plastic drainage tubes is a main task in planning and design of a drainage system.
農田塑料暗管埋深和間距的確定，是塑料暗管排水系統規劃設計的主要任務(wù)，關(guān)系到排水效果和投資效益。 - The classification of the community types mainly reflected the variations of soil salt content and ground water depth, which were decided by microtopography.
群落類(lèi)型的劃分主要反映了微地貌所決定的地下水埋深及土壤鹽分含量的變化。
