The phosphorus at the bottom of the ocean has to somehow make its way back to the surface, to complete the cycle, to begin the cycle all over again.
海底的磷必须找到某种方式回到表面，以完成这个循环，从而重新开始这个循环。
An owl's head, for example, can twist so far round that it faces backward, but when the bird wants to look forward again, it must turn its head back the way it came.
比如说猫头鹰可以将正脸一直转到后脑勺的位置，但是如果它再想看到正前方的东西，那整个头部只能原路返回了。
The balloons are inflated to push the bone back into its normal position, then bone cement is used to keep it from collapsing again.
气球膨胀将骨头推向正常的位置，然后骨头接合剂防止脊椎骨再次损伤。
But that only lasts two or three months until, suddenly, they're back and the year starts again with its moments of frantic effort and spells of inactivity.
但是这种情况只会持续两、三个月，突然学生们都回来了，新的学年又开始了，大家又重新投入到快节奏的生活当中，偶尔也会有不活跃的时候。
Now in 2011, raw, unpasteurized milk has made its way back into some Americans' diets and is once again causing outbreaks of disease.
如今2011年，未经过巴氏灭菌的生奶又回到了美国人的餐桌上，再一次引发了疾病爆发。
This turns the refrigerant back into its cooler liquid state to be used again.
这又将制冷剂变回原先的较冷的液态，从而可以再利用。
If the economy stumbles again before inflation is put back in its box, he will face a much tougher test.
如果在通胀还未回到潘多拉盒子里面时经济就出现问题的话，他还会面临更加严峻的考验。
For much of the way, the road ran beside the line, disappearing into its own tunnels as we slid through ours from light into darkness and back again.
在大部分路程中有一条公路与铁路并行，直到公路进入隧洞，火车也从亮到暗再到亮地驶过隧洞。
Though not the first such roadable plane with folding wings, Terrafugia claims its transition is the only one capable of a seamless transition from road to air and back again.
虽然不是第一架可以在公路上行驶的可折叠翼飞机，特拉·弗吉亚表示他们的陆空两用机是唯一一种可以做到在陆空之间做到无缝连续切换的飞机。
Coordinated action by the world's major central Banks on March 18 - the first such actions since 2000 - drove the yen back down to its pre-quake levels, but it's been climbing again this week.
3月18日世界主要央行的协同行动- - -自2000年以来的首次此类行动- - -已将日元对其他货币价值拉回至震前水平，但本周又持续攀升。
NHibernate USES mapping files to guide its translation from the database to business objects and back again.
NHibernate使用映射文件来引导从数据库数据到业务对象的转换。
It was a brilliant day and it was nice to hear the Kop's humour at its best again when they were telling me to go back to Coventry.
这是美好的一天，当他们告诉我回到考文垂去的时候，我感到再次以最好的方式听到考普山的幽默真是非常美妙。
After you've finished the last chapter (" Thinking Like a Trader "), take the Attitude Survey again - its reprinted at the back of the book.
当你完成了最有一章(“像交易者一样思考”)，再次做这个态度调查——在本书后面又印了一次。
At sunset, the Sun would drop below the horizon, then pop back up into view before resuming its normal course, ultimately setting again for a second time within a week.
日落时太阳将先落下地平线然后在一般情况出现前重新露出再在一周的时间里继续落下第二次。
Once a beautiful flower put its head out from the grass, but when it saw the notice-board it was so sorry for the children that it slipped back into the ground again, and went off to sleep.
一次，一朵美丽的花儿从草间伸出头来，可是当它看到告示牌的时候，它为孩子们感到难过，又把头缩回到地里，继续沉睡。
Again, their reading speed initially dropped when they were given this new task, but soon, with practice, it was back up to its original level.
同样，在给与新任务的时候，他们的阅读速度最初下跌，可是不久，经过练习，阅读速度又回到了最初水平。
It is curious how easily satisfaction finds its temporary fulfilment and one holds onto it, though it soon fades and the wanting more comes back again.
很奇怪，满足感是那么容易被暂时抚平，然后你抓住它不放，尽管它很快就会消逝，那个想要更多的感觉又回来了。
Britain has to take its teeth seriously again or we will soon be back to wooden dentures.
英国必须重新重视其牙齿来，否则我们很快戴上木质假牙。
Japan again managed to claw its way back into the game, though, with Homare Sawa netting in the dying minutes.
但是日本也再次设法扳回一局，泽穗希在接近终场射球入门。
Thee artisans followed his command, but once again, the seal appeared with a turtle on top, looking back over its shoulder.
工匠们遵照他的命令，铸出来的官印上面还是有一只乌龟在向后张望。
He said they all needed to work together to put the country's economy back its feet again.
他声称他们需要通力合作才能使经济恢复到原来的状态。
The welcoming décor and glass of aperitivo adds to its charm. Come see for yourself why we have become so popular. You will be back again and again.
餐厅内美好的装饰和阿普瑞提式的玻璃更为这餐厅增添了一份魅力。我们欢迎您来亲眼鉴证我们是如何赢得大家的喜爱，相信您也将会再次回来，成为我们的朋友。
We are longing for this true 'me' finding its way back and never get lost again.
我们迫切的需要这种真实的“我”让自己不再迷失。
Perhaps its that favourite author bringing you back time and time again? Maybe it's the ambience?
可能是你喜爱的作者能够一再地带你回到过去的时光或者是那种氛围？
No doubt, his heart had been gradually losing its human substance, and transmuting itself into insensible metal, but had now softened back again into flesh.
毫无疑问，他的心曾经渐渐失去了人类心中实质的东西，变成了没有情感和感觉的金属，但现在又开始软化成血肉了。
After landing, the vehicle must take off again within a predetermined time, fly for a certain amount of time and then land back on its original launch pad.
降落后，运输工具必须在指定时间内重新起飞，飞行一段时间并回到出发地。
If Yahweh looks kindly on me, he will bring me back and allow me to again see the ark and its lodging place.
若我在上主眼中蒙恩，他必会领我回来，再能见约柜和他的圣所。
When we light a fire, the darkness disappears and light come to take its place; but as soon as the fire goes out, the darkness come back again.
当我们点燃了火，黑暗便消失而光明取而代之，但一旦火熄了，黑暗又会再回来。
When we light a fire, the darkness disappears and light come to take its place; but as soon as the fire goes out, the darkness come back again.
当我们点燃了火，黑暗便消失而光明取而代之，但一旦火熄了，黑暗又会再回来。
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