例句與造句

1. The necessary motion spray irrigation powered vehicle composition migration or half fixed spray irrigation unit , use each kind of water source ( well , ditch , river , pond , lake , pond ) carry on the spray irrigation to the size land parcel
   配套移動(dòng)噴灌動(dòng)力車，組成移動(dòng)或半固定噴灌機(jī)組，利用各種水源（井、渠、河、池、湖、溏）對(duì)大小地塊進(jìn)行噴灌。
2. 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(tǒng)的管網(wǎng)投資、年運(yùn)行費(fèi)用與管徑函數(shù)關(guān)系的基礎(chǔ)上，利用工程經(jīng)濟(jì)分析中費(fèi)用最小化準(zhǔn)則和非線性規(guī)劃理論，建立了求解噴灌系統(tǒng)管網(wǎng)經(jīng)濟(jì)管徑的數(shù)學(xué)模型，并給出了無約束條件直接求解經(jīng)濟(jì)管徑的計(jì)算式。
3. It's difficult to find fixed spray in a sentence. 用fixed spray造句挺難的