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寿命；使用寿命
1、equal length───[统计]等长；[统计] 等长
2、length of stay───停留时间；住院时间；滞留时间
3、dress length───衫长
4、back length───后面长度
5、life of───…...的生活
6、length───n.长度，长；时间的长短；音长
7、wavering length of upland───高地起伏长度
8、span length───杆间距离，跨度距离；跨度距离；杆间距离
9、a length of───一段
1、The test, however, is not capable of giving an exact length of life in terms of months or years.───然而这项检测并不能将生命的长度精确到年月。
2、No matter how it happened, millions of Americans are putting their health, quality of life and even length of life in danger.───无论如何，数以百万计的美国人正将他们的健康、生活质量甚至寿命置于危险之中。
3、Researchers have uncovered that the month in which babies are born could also affect everything from intelligence to length of life.───研究人员已经揭示：婴儿出生的月份可能会影响此人的智力、寿命等一切。
4、They hope that by studying the aging medical science they may be able to make the length of life longer.───他们希望通过研究老化的医学科学，他们也许能够使生命的长度变长。
5、From cradle to grave, only a few decades, the length of life, hardness, weight is not only in the calculation process can be realized.───从摇篮到坟墓，只有短短几十年的过程，生命的长度、硬度、重量都是无法计算的，只有在过程中才能够体会。
6、It is not length of life, but depth of life.───要的不是生命的长度，而是生命的深度。
7、It has reduced mortality rates and prolonged the average length of life, thus multiplying population figures.───它减低了死亡率，延长了人的生命期，因而使人口倍增；
8、Antiviral drugs, which typically attack viral proteins, have had a huge impact on the quality and length of life of HIV-positive patients.───通过攻击病毒蛋白，抗病毒药物能极大地提高HIV阳性病人的生活质量并延长其生存时间。
9、length of life is measured by time, but the quality of it is measured by thought.───衡量生命长度的是时间，衡量生命质量的是是否有思想。
1、A further difficulty is that it would apparently require us to put enormous resources towards trivial increases in length of life.
2、The invention can efficiently decrease the steel bag slag blanket thickness; prolong the steel bag length of life.