例句與造句

1. The mesoproterozoic mafic dyke swarms are extensively distributed in the central north china craton , which are not deformed and metamorphic , emplacing the pre - existed fractures , so the dyke swarms become the conspicuous marks to reconstruct the mesoproterozoic tectonic stress field of the central ncc . the mafic dykes in the northern block are transtensional while the dykes in the central and southern blocks are extensional . the mesoproterozoic tectonic stress field could be simulated on the analysis of the distribution and mechanical origin of the mesoproterozoic mafic dyke swarms in the central ncc . the simulation result shows that the mafic dyke swarms were formed in the extensional tectonic setting in the ncc in the mesoproterozoic time , which are related to the extension of the mesoproterozoic yanliao - zhongtiao aulacogens cross the central ncc
   克拉通北部地塊的鎂鐵質(zhì)巖墻群為張剪性，而中部和南部地塊為張性。根據(jù)華北克拉通中部中元古代鎂鐵質(zhì)巖墻群的分布和成因機(jī)制分析，來(lái)恢復(fù)模擬中元古代的構(gòu)造應(yīng)力場(chǎng)。數(shù)值模擬結(jié)果表明鎂鐵質(zhì)巖墻群在中元古代形成于伸展的大地構(gòu)造背景，與橫穿華北克拉通中部的燕遼-中條拗拉槽系的伸展作用有一定的聯(lián)系。
2. It's difficult to find pre-existing fractures in a sentence. 用pre-existing fractures造句挺難的