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1·He got Jack by the leg and pulled him out.

他抓住杰克的腿并把他拉了出来。

2·You goin a do this next summer? said Jack to Ennis in the street, one leg already up in his green pickup.

“你明年夏天还来吗？”在街上，杰克对埃尼斯说，一脚已经跨上了他那辆绿色卡车。

3·Now, said Jack, I must not lose this donkey as I did that leg of mutton yesterday.

“现在，”杰克说：“我可不能再像昨天拖坏羊腿那样，把毛驴再给糟蹋了。”

4·Fan Jiafa, the father of mini Jack Ma, had his right leg amputated as a young man after being bitten by a viper.

“小马云”的父亲范佳发（音）年轻时由于被毒蛇咬伤，截去了右腿。

5·Therefore, it is convinced that models and methods of optimum lectotype in this thesis are effective and can be a useful tool in the concept design of the jack-up truss-type leg.

综上表明，本文所采用的优化模型和方法简单实用，优化效果显著，为自升式平台桁架腿的概念设计提供了一种有效工具。

6·Play well, Jack--break a leg!

杰克，好运！ 祝你演出成功！

7·The comparative analysis of stress nephogram and data of leg well area is of guiding significance to the research on how to avoid boundary effect during the calculation of jack-up's leg well area.

围井区应力图像和数据的分析，对自升式平台围井区计算中如何避免边界效应的影响具有一定的指导意义。