例句與造句

1. it has shown by the uncertainty of the data of fatigue experimentation and the size deviation of machine accessory and structure component and the original defect of materials that all of the stress and intensity and the factors that affect them are stochastic variables, so we should deal with the problem of fatigue by the method of probability and statistics to making the engineering life deduced by fatigue intensity to be the reliable life under a certain probability
   疲勞試驗(yàn)數(shù)據(jù)的離散性，零件和構(gòu)件加工允許的尺寸偏差，材料中分布的原始缺陷，以及受載零件危險(xiǎn)部位應(yīng)力響應(yīng)的分布特性等，都說(shuō)明應(yīng)力和強(qiáng)度以及影響它們的因素都是隨機(jī)變量，它們有各自的分布形式，應(yīng)該用概率統(tǒng)計(jì)理論和方法來(lái)處理，才能使疲勞強(qiáng)度在工程中所確定的壽命，成為保證某一概率下的可靠壽命。
2. under the complex loadings, the surface flaws of large complex structures and the original defects of materials would initiate the propagation of micro three-dimensional ( 3d ) cracks, and result in catastrophic accidents . for the limitations of the traditional theories of two-dimensional cracks, the safety of actual structures containing 3d cracks cannot be guaranteed completely without the out-of-plane stress constraint
   復(fù)雜應(yīng)力作用下,宏觀復(fù)雜結(jié)構(gòu)表面加工質(zhì)量和材料本身固有缺陷以及外來(lái)?yè)p傷等會(huì)引起三維裂紋的萌生、擴(kuò)展,最終導(dǎo)致災(zāi)難性的破壞,而傳統(tǒng)二維裂紋理論在解決實(shí)際三維裂紋問(wèn)題時(shí)出現(xiàn)不足,無(wú)法完全保障結(jié)構(gòu)安全。
3. It's difficult to find defect of material in a sentence. 用defect of material造句挺難的