back erosion 中文意思是什麼

back erosion 解釋
向源侵蝕
  • back : n 1 背，背部；背脊；背面，反面；背後，後部，後面，裏面。2 （指）甲；（刀）背；（手）背；（書）背...
  • erosion : n. 1. 腐蝕，侵蝕（作用）。2. 【醫學】糜爛，齒質腐損。
  1. But then, with the intention of bringing trees back to the territory, serious efforts were made by the government to green the countryside. however, the hills - and even some valleys - were dominated by badlands and erosion scars

    不過，當年的山嶺，以至部分山谷，皆遍布劣地和侵蝕遺痕加上這崎嶇不平之地主要由花崗巖組成，表土養分易於流失，凡此種種，都對植樹工作構成嚴峻的考驗。
  2. Variations in pressure with and without aeration in cavitation region are measured and the compressible characteristics of pressure waveforms and relation between mach number and compression ratio are analyzed ; the time - averaged pressure profiles of different air concentration in cavitation erosion region are measured, the variations of the pressure with air concentration and effects of back pressure on cavitation erosion are analyzed ; the relations between least air concentration to prevent cavitation erosion and flow velocity are proposed ; the cavitation numbers with and without aeration in cavitation region are compared

    實測了空化區摻氣前後壓力的變化，分析了壓力波形的可壓縮流特徵以及馬赫數與壓縮比的關系；實測了空蝕區不同摻氣濃度的時均壓力分佈，分析了壓力隨摻氣濃度的變化及背壓對空蝕的影響；提出減免空蝕的最低摻氣濃度與流速的關系，比較了摻氣前後水流的空化數。
  3. Most plants use up nitrogen. but legumes put nitrogen back into the soil. forage crops also help limit erosion

    多數作物利用氮，而豆類作物把氮放回土地。草料作物還可以幫助限制土地侵蝕。
分享友人
分享到 Line

分享到臉書