例句與造句

1. Abstract : in this paper , the stress field in a concave plank being upset is resolved by analytic mathematical method of plastic mechanics , the relation between the geometric parameter ( dimension ratio , concave shape ) and friction shearing stress is determined for upsetting a plank free of tension stress
   文摘:本文用塑性力學(xué)初等解析法求解了凹形板坯鐓粗時(shí)的應(yīng)力場(chǎng)，確定了無(wú)拉應(yīng)力鐓粗時(shí)坯料幾何參數(shù)(尺寸比、凹形形狀)與坯料端面摩擦剪應(yīng)力的關(guān)系。
2. It's difficult to find dimension ratio in a sentence. 用dimension ratio造句挺難的