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The most talented professionals are often courted by other businesses and the effects of turnover can be costly.

资历高的从业人员被更好的企业所吸引从而流失。

Since Tim Berners-Lee a diffident British scientist created the World Wide Web of global computers in l990 the only way to get onto the Internet has been through a computer a costly box that daunts people as much today as the telephone did 50 years ago.

自从Tim Berners－Lee，一位怕羞的英国科学家于 1990年发明了全球计算机万维网以来，上网的唯一途径是通过计算机，而计算机十分昂贵，许多人被拒之门外，就象50年代电话将人拒之门外一样。

Tianjin, like much of northern China, has an acute shortage of it. Binhai will depend on water diverted from the Yangtze River basin, a massively expensive project, as well as desalinated seawater, which is also costly. The government, rather than industry, is likely to bear most of the burden.

天津和大多数北方城市一样严重缺水，滨海新区将依赖于从长江引来的水，而这是通过一个如淡化海水般耗费巨大的工程实现的，其费用也主要将由政府而不是企业负担的。

"But like any other behavior that doesn't lead directly to reproduction—such as aggression or altruism—same-sex behavior can have evolutionary consequences that are just now beginning to be considered," he said."For example, male-male copulations in locusts can be costly for the mounted male, and this cost may in turn increase selection pressure for males' tendency to release a chemical called panacetylnitrile, which dissuades other males from mounting them."

&但是如其他并不直接影响繁殖的行为-如挑衅或利他行为，同性间的性行为也可能产生进化结果，这一点刚开始加以考虑&他说，&比如，蝗虫中雄性之间的交配对被交配的雄性来说代价很大，但同时也增加了选择力，因为雄性接下来会释放一种叫panacetylnitrile的物质，这种物质能阻止其他雄性来跟它交配。&

For example, male-male copulations in locusts can be costly for the mounted male, and this cost may in turn increase selection pressure for males' tendency to release a chemical called panacetylnitrile, which dissuades other males from mounting them, said Bailey.

贝利说：&举例来说，雄性蝉之间的交媾对上位的雄性蝉来说代价昂贵，会付出生命的代价，而这种代价可能反过来增加了选择压力，促使雄性蝉倾向于释放一种称为panacetylnitrile的化学物，这种化学物会阻止其他雄性蝉，避免他们上位交媾。&

"For example, male-male copulations in locusts can be costly for the mounted male, and this cost may in turn increase selection pressure for males' tendency to release a chemical called panacetylnitrile, which dissuades other males from mounting them," said Bailey.

贝利说：举例来说，雄性蝉之间的交媾对下位的雄性蝉来说代价沉重，而这种代价可能反过来增加了选择压力，促使雄性蝉倾向于释放一种称为 panacetylnitrile 的化学物，这种化学物会阻止其他雄性蝉爬到自己身上进行交媾。

Modern, manufactured dyes can be costly.

现代的染料制造是较贵的。

DC was called the rich man's current because only the very rich like Morgan could afford to have the costly dynamos in their homes.

直流被称为富人的电流，因为只有像摩根非常丰富的可承受的代价高昂的发电机在自己的家园。

The enervating, costly process of gearing up for an attack, making the attack, carrying the attack home, mopping up after the attack, took half a day or more.

组织一次进攻，发起该次进攻，达成进攻目标的过程疲惫不堪且代价高昂，得费时半天甚至更长时间。

Eradicates potentially costly errors from the manual re-keying of data.

通过手动对数据重新加密密匙，删除可能非常重要的错误。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。