sand removal 中文意思是什麼
sand removal
解釋
沖砂-
Effects of removal of the shoot apex and leaf wounding on nitrogen uptake and nicotine production were studied with tobacco plants grown in sand or hydroponic medium under the controlled conditions
摘要採用砂培和營養液培養方法，研究了在營養生長階段切除頂芽和葉片損傷對煙株生長、體內煙堿濃度、氮濃度及吸氮量的影響。 -
The effort of manganese removal was studied and the kinetics of manganese removal was tried to establish. the factors of dissolved oxygen concentration, fe2 + concentration, ph, p concentration and closing of the filter were studied to evaluate their effort for biological manganese removal, and the correlation of residual manganese and oxidation - reduction potential was also discussed. as the iron content of water was high, experiment results showed that the reaction was zero order, as the iron content of water was low, the reaction was first order. the time needed for the cultivation of biological manganese removal was 60 70 days. the filter operated at the filtration rate of 8 10m / h, silica sand of effective size 0. 95 1. 25mm filled the filter to a depth of 1200mm
試驗結果表明，成熟后濾砂表面濾膜的x射線衍射圖譜與mno _ x ? 5h _ 2o （ x = 1 . 86 ）的x射線衍射圖譜一樣，濾膜成熟后的結構在進水物質不發生變化的情況下不發生變化;合適的碳磷比對生物除錳有明顯的促進作用，試驗條件下的投磷量不會對出水造成二次污染;生物除錳需要亞鐵的參與，亞鐵的存在除了能夠促進微生物分泌胞外酶並刺激其活性外，還通過鐵離子的變價傳遞電子，催化錳離子的氧化反應，從而促進對二價錳的降解。 -
Most of the soil had been washed away or buried in drift after the removal of the trees ; only where the streamlet ran down from the kettle a thick bed of moss and some ferns and little creeping bushes were still green among the sand
在樹木被搬走以後，大部分土壤不是被雨水沖走就是埋成了堆，只在那細泉從鍋中溢出后形成的細流邊上，有一塊厚密的苗床，上面長著些苔蘚羊植物和蔓延在地面上的小灌木叢，仍然在這沙地上搖曳著一片碧綠。 -
The results also show that the filtration effect is improved by the sand coated with metal oxide, and coagulation which is combined with filtration can enhance the efficiency of algae removal
對水樣進行過濾處理，發現用金屬氧化物進行罩蓋過的石英砂對其過濾效果有所提高。 -
In a wind - eroded region, such measures as exploitation of water resources, water diversion for sand removal, planting of trees and growing of grass, installation of artificial sand - break and forest network shall be adopted to build a protective system for windbreak and sand - fixation, thereby controlling hazards of sand storms
在風力侵蝕地區，應當採取開發水源、引水拉沙、植樹種草、設置人工沙障和網格林帶等措施，建立防風固沙防護體系，控制風沙危害。 -
Sand removal permit
搬運海沙許可證
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