The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.
答案可能是，现在火星上几乎所有的水都被锁在地表下的永久冻土层中，更多的水被包含在这个星球的极地冰帽中。
According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.
根据其支持者的说法，一种新型飞机掠过大气层，可以在两小时内飞到地球上的大多数点。
Because the face of the woman in the under image also appears on canvases Van Gogh is known to have painted, the surface painting must be an authentic self-portrait by Van Gogh.
因为下面的女人的脸也出现在梵高画过的画布上，所以这幅凸版印刷一定是梵高的自画像。
In the years that followed, he lived a recurring cycle of drink and violence, often sleeping on the beach or under the pier in Brighton.
在随后的几年，他一直过着酗酒和暴力相间的生活，常常在长椅或是布赖顿码头下上过夜。
When an employee goes on paternity leave and is with his kids, he gets a new kind of training: in how to keep cool under stress.
当员工休陪产假，和孩子们在一起时，他会得到一种新的训练：如何在压力下保持冷静。
"When an employee goes on paternity leave and is with his kids, he gets a new kind of training: in how to keep cool under stress," says spokesperson Christine Elberg Holm.
“当员工休陪产假和孩子们在一起时，他会得到一种新的培训：如何在压力下保持冷静。”发言人克里斯汀·埃尔伯格·霍尔姆说。
"When an employee goes on paternity leave and is with his kids, he gets a new kind of training: in how to keep cool under stress," says spokesperson Christine Elberg Holm.
“当员工休陪产假和孩子们在一起时，他会得到一种新的培训：如何在压力下保持冷静。”发言人克里斯汀·埃尔伯格·霍尔姆说。
Under the alternative vote system, voters would be invited to rank candidates on the ballot in order of preference.
采用选择投票制，选民可在选票上根据喜好程度为候选人排序。
Down in the rec room I lay on my side under the pool table.
在下面的娱乐室里，我侧躺在台球桌下。
However, when diatoms are observed under constant conditions in a laboratory, they still display periodic behavior, continuing to burrow on schedule for several weeks.
然而，当在实验室的恒定条件下观察硅藻时，它们仍然表现出周期性的行为，继续按计划挖掘几个星期。
Wildman and Niles were particularly interested in investigating the conditions under which reflection might flourish—a subject on which there is little guidance in the literature.
怀尔德曼和奈尔斯特别感兴趣的是研究在何种条件下，思考可能会活跃——这是一个在文献中几乎没有任何指导的主题。
From then on his sketches, which appeared under the pen name "Boz" in The Evening Chronicle, earned him a modest reputation.
从那时起，他的小品文以“博兹”这一笔名刊登在《纪事晚报》上，为他赢得了一定的声誉。
The oaks in the temperate belt and the plants under the mountain are scattered distinctively and vertically on the slopes of the island.
温和地带的栎木和山下的植物，这些不同树种形态的垂直分布在海岛的斜坡山是清晰可见的。
This bid for the Crafer family's farms now under review has stirred up the considerable concern in a country that mostly depends on the dairy industry.
目前正在审查的对Crafer家族农场的收购，在一个出口收入大部分依赖乳制品行业的国家，引起了相当大的担忧。
Robots are currently under a two-year trial in Wales which will train "farmbots" to herd, monitor the health of livestock, and make sure there is enough pasture for them to graze on.
目前，威尔士正在对机器人进行为期两年的试验，他们将训练“农场机器人”来放牧、监测牲畜的健康状况，并确保有足够的草场来饲养他们。
If you put a stone in the way of an ant, it will go around, over, under or on top, without stopping, until it finds a way to get where it needs to be.
如果你用石头挡住蚂蚁的去路，它会不停地绕道、从上面越过、从底下或从顶部走，直到它找到一条通向目的地的路。
Yet on these and similar formations in deserts around the world, a few fierce plants have adapted to endure under ever-changing conditions.
然而，在世界各地的沙漠中的这些构造或类似的构造上，一些“凶猛”的植物已经适应了在不断变化的条件下生存。
"Boots and shoes under the sea," the Gryphon went on in a deep voice, "are done with a whiting."
“靴子和鞋子在海里，”鹰头怪用低沉的声音继续说，“是用鳕鱼的雪擦亮的。”
According to data released in January 2017, 56 percent of bills are paid online, which means that just under half of payments still rely on delivery services to be completed.
2017年1月发布的数据显示，56%的账单是通过网络支付的，这意味着只有不到一半的账单是通过快递服务完成的。
On these and similar formations in deserts around the world, a few fierce plants have adapted to endure under ever-changing conditions.
在世界各地的沙漠中，这些和类似的岩层里，一些顽强的植物已经适应了在不断变化的条件下继续生存。
In the section on the marketing mix, under "Product".
在有关营销组合的一节中的“产品”一栏。
Don't tie [put on] your shoes in a melon patch or adjust your hat under a plum tree -- avoid being suspected.; Don't do anything to arouse suspicion.
瓜田不纳履， 李下不整冠。
In this work, copper underpotential deposition on gold is studied under realistic electrochemical conditions
本文研究了在实际电化学条件下铜在金表面的低电位沉积
The effect of PPF and DIF on plantlet growth of potato in vitro under photoautotrophic condition was investigated.
研究了光通量和昼夜温差对自养培养马铃薯试管苗生长的影响。
Design work on the Mi-28 began under Marat Tishchenko in 1980.
Mi-28的设计工作在1980年由马拉特·季先科负责开始。
In the text document, for instance, the E-mail and postal addresses are on different lines; in XML, I want everything under one tag.
例如，在文本文档中，电子邮件和邮政地址在不同行上；在XML中，我希望所有内容都在一个标记内。
"A differentiator is whether the person can articulate that they've brought a project in on time — or, better yet, under budget — and how they did that," she says.
辨别优秀项目经理的关键是，看他是否有在规定时间内——低于预算更好——完成一个项目的经验，并且能清楚地讲明是怎么做到的。
Snuggled up in bed on a cold winter day, warm under the covers.
在寒冷的冬夜一起依偎在被窝中取暖。
But in April, on his website under the heading, "I Apologise", Mr Roh said that he had requested, received and used money from a businessman.
但4月，在他的个人站点的标题下，“我道歉”，卢说他要求、接受并使用了一个商人的钱。
That is why successful SaaS applications are usually projects that come in on time and under budget.
这就是为什么成功的SaaS应用程序往往都是在预算内按时完成的项目。
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