例句與造句

1. It was found that many dislocations were emitted from the crack tip during the early stage of crack propagation and were driven out of the crack tip area , and them piled up inversely . a closed dislocation free zone ( dfz ) was formed between the crack tip and the pile - up dislocations . keeping displacement constant , the dislocations were still emitted from the crack tip for a while
   本文首先系統(tǒng)地研究了工業(yè)純金屬( fe ， al ， ti和mg )斷裂的微觀過程，發(fā)現(xiàn)所研究的工業(yè)純金屬斷裂過程裂尖均首先發(fā)射位錯，并離開裂尖向前運動、在裂尖留下無位錯區(qū)，位錯反塞積在五位錯區(qū)的端部，反塞積位錯群一般呈封閉狀包圍無位錯區(qū)。
2. It's difficult to find closed dislocation in a sentence. 用closed dislocation造句挺難的