直徑約數 的英文怎麼說

中文拼音 [zhíjìngyāoshǔ]
直徑約數 英文
diameter rounding
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 徑 : Ⅰ名詞1 （狹窄的道路; 小路） footpath; path; track 2 （達到目的的方法） way; means 3 （直徑的簡稱...
  • 約 : 約動詞[口語] （用秤稱） weigh
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 直徑 : diameter; diam
  • 約數 : 1. （大約的數目） approximate number2. [數學] （能整除某個數的數） divisor; submultiple
  1. Cymes 1 - 2 in axil of leaves, rather short ; flowers pale green, 7 mm in diam., 5 - merous ; sepals imbricate, inner two larger ; petals suborbicular, 3 mm long ; stamens without filaments ; pistil without style, stigma appressed, minutely 5 - lobed

    聚傘花序1 - 2腋生，短小；花淡綠色，直徑約7毫米； 5數；萼片覆瓦狀排列，內方2片較大，邊緣常有深色細淺齒；花瓣近圓形，長約3毫米；雄蕊無花絲；雌蕊無花柱，柱頭平貼，微5裂。
  2. The " eye " is typically of the order of tens of kilometres in diameter. it is essentially a core of descending air where clouds are relatively broken and winds are relatively calm

    典型的風眼直徑大約有數十公里，實質上是下降氣流構成的核心，該區雲層稀薄，風力微弱。
  3. After incubated for 5 days, the majority of plagues was about 1mm in diameter. the shapes of plagues were difform and some of them were round. the plagues were no color under low power microscope and the area of the plagues consisted of obtrite dead cell lumps

    採用雙層法用ma104細胞進行病毒蝕斑試驗， jl94能形成大多數直徑約1mm左右的蝕斑，大部分形狀不規則，少部分呈圓形，鏡下可見清晰的不著色區，此區由碎裂的死細胞團構成。
  4. On the basis of the study of the theory and appraise method on land use in the small towns from home and abroad, this paper at first conducts a deep study on the development and role of the small towns, indicating that its development has sawn an uneven development phrase and becomes a carrier of the enterprises, a pool of surplus laborers, a hub of material exchanges between the rural and urban areas, a base of spiritual civilization, an important way to achieve urbanization. second, it conducts a study on the situation and features and the problems the land use, indicating that the efficiency of the land use is low, which has a direct influence on the development of agriculture and the role of the small towns. and the study of the demand of the land indicates the shortage of land is serious, and the small town must rationally use the land and increases its intensive role and the economical efficiency to meet the demand

    在分析國內外已有關于小城鎮土地利用的理論與評價方法的基礎上，首先對小城鎮在我國的發展、地位和作用進行了深入的分析，判明我國小城鎮發展經歷了一個曲折向上的發展階段，已成為鄉鎮企業的載體，農村剩餘勞動力的蓄水池，城鄉物資交流的樞紐，農村精神文明的基地，是我國城市化的重要途徑；其次，對小城鎮土地資源利用現狀和特徵進行了探討，並對發展小城鎮建設導致的土地利用問題進行了剖析，表明目前我國大多數小城鎮土地效益和規模效益低下，佔用耕地過多，直接影響農業的發展，影響小城鎮的地位和作用；通過小城鎮土地供需分析研究表明，我國土地短缺十分嚴峻，小城鎮土地需求缺口較大，小城鎮必須合理利用現有土地，增強集約功能和土地經濟效益，從而緩解需求壓力；最後，論文通過運用特爾菲法，描述統計分析法、多元統計分析（主成分分析）法和系統分析法中的層次分析法（ ahp ）等一系列方法，結合定性和定量兩方面，從土地質量、土地資源數量與結構、土地經濟效益、環境效益、社會效益等五個方面進行分析，篩選、建立了土地資源利用評價指標體系，在因子評價的基礎上，建立了土地利用綜合評價模型，並給出了評價過程和方法。
  5. Based on the analyses of the investment of nozzle tube net and relationship between the annual operation cost and tube diameter function of a fixed spray irrigation system, a mathematic model to calculate the economical tube diameter of a spray irrigation system is developed by using the minimum expense norm and nonlinear planning theory in engineering economic analysis, and a direct calculation formula for the economical tube diameter in unrestrained conditions is presented

    摘要在分析了固定式噴灌系統的管網投資、年運行費用與管徑函數關系的基礎上，利用工程經濟分析中費用最小化準則和非線性規劃理論，建立了求解噴灌系統管網經濟管徑的數學模型，並給出了無約束條件直接求解經濟管徑的計算式。
  6. Body is radially symmetrical and covered with numerous short spines, measures 5 - 7 cm across

    身體對稱，布滿無數短針，直徑長約五至七厘米。
  7. The paper indicates that the study on mechanism of boiling heat transfer in microchannels does not first - orderly instruct engineering design and appliance, and they are constraints between geometric dimension, passage diameter, number and length efficiency of evaporators, pump power and so on

    指出對于微通道沸騰換熱的傳熱機理等的研究對工程設計和應用來講還沒有形成合適的技術指導依據，蒸發器尺寸、通道直徑、數目、通道長度、換熱效率以及泵功率之間是相互制約的。
  8. A cumulonimbus cloud typically covers an area of a few kilometres in diameter with a vertical extent of ten kilometres or more, like a tower hanging in the sky

    每塊積雨雲覆蓋范圍一般直徑只有數公里，高度約十餘公里，遠看就如空中的一座塔。
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