To do fatigue reliability analysis for the cracked structures can give us some reference for the safety evaluation of such structures, so it has great practical significance. 對含裂紋結構進(jìn)行疲勞可靠性分析，可以為此類(lèi)結構的安全性評估提供參考，具有很大的現實(shí)意義。
The reduction of insoluble quinones to soluble hydroquinones and reoxidation in air to the quinone structure is the principle involved in dyeing cloth with"vat" dyes. 甕染燃料對布料著(zhù)色的原理在于不溶性醌類(lèi)的還原和可溶性氫醌于空氣中被再氧化至醌類(lèi)結構。
