例句與造句

1. The elliptical cross - section is assumed for the braiding yarn , which is more approximate to the realistic situation of the yarn in the composites
   該模型中編織紗線具有橢圓形橫截面，較已往圓形橫截面的假設(shè)更接近于真實情況。
2. The experimental and numerical studies on the two enhanced tubes are performed . the strong multi - longitudinal vortex flow in the aea - tube is induced by alternating change of the elliptical cross - section , and for the ddir - tube , the strong multi - longitudinal vortex flow is
   交叉縮放橢圓管是通過橢圓截面的交叉變化誘導(dǎo)產(chǎn)生強烈的二次流和多縱向渦流，而不連續(xù)雙斜向內(nèi)肋管則是通過不連續(xù)的雙斜向內(nèi)肋對的作用形成強烈的多縱向渦。
3. First , with the variational method , the variational lower bounds of the characteristic impedance are respectively computed of the conformal coaxial lines with circular , regular polygonal and elliptical cross - sections . then the optimal variational lower bound of the conformal coaxial line with a square cross - section is obtained
   本文首先用變分法求解了截面為圓形、正多邊形和橢圓形的共形同軸傳輸線的特性阻抗的變分下界，得到了截面為正多邊形的共形同軸傳輸線特性阻抗的變分最優(yōu)下界。
4. It's difficult to find elliptical cross-section in a sentence. 用elliptical cross-section造句挺難的