它们的缺失使寒冷、干燥的火星经历了从未经历过形成湖泊和海洋所需的延长温和期的景象。
Their absence supports the picture of a cold, dry Mars that never experienced the extended mild period required to form lakes and oceans.
这样做的目的是延长产品的寿命,使销售额和利润不会下降。
The goal is to extend product life so that sales and profits do not decline.
穆里尔·克里克对雷·奥尔森说,毫无质量可言地延长生命,无异于使老年人失去了最后几年有意义的生活。
Prolonging life at the expense of its quality can rob elderly people of meaningful years, Muriel Gillick tells Les Olson.
You can keep people alive for many decades with periodic dialysis to remove waste products from the blood.
通过周期性的透析除去血液中的代谢废物,可以使病人寿命延长几十年
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