例句與造句

1. It advances that the non - lapping envelope region is a major fact of generating roundness errors and inquires into the effects of ball roundness with non - lapping envelope region , preliminary pressure error and lap tool wear
   根據(jù)四研具體對(duì)球面研磨的包絡(luò)原理，提出了未包絡(luò)研磨區(qū)是產(chǎn)生殘存圓度誤差的主要因素，并探討了未包絡(luò)研磨區(qū)、四研具初始?jí)毫φ`差、研具磨損不均勻性產(chǎn)生的原因和對(duì)研磨殘存圓度誤差的影響及解決措施。
2. It's difficult to find preliminary pressure in a sentence. 用preliminary pressure造句挺難的