Looking at a number of sources gives you a good knowledge base, but students only have a limited amount of time to work on each paper.
阅读大量的文献可以打下坚实的知识基础，但是学生们完成每篇论文的时间非常有限。
New products and production processes are transferred to the developing countries only after a substantial amount of time has lapsed.
只有经过很长时间以后，新产品和新生产流程才转移到发展中国家。
I've only had time to flick through your report but it seems to be fine.
我的时间不多，只是草草翻阅了一下你的报告，但似乎还不错。
The only time that we attempted to do something like that was in the city of Philadelphia.
我们惟一一次试图做那样的事是在费城。
She's only five—she hasn't learnt to tell the time yet.
她才五岁，还没有学会看钟表。
It's only the second time a potential heir to the throne has married a commoner.
这只是第二次王储与平民结婚。
Compared to people living only a few generations ago, we have greater opportunities to have a good time.
与生活在仅仅几代之前的人相比，我们有更大的过得快乐的机会。
With no young trees to replace them, it is only a matter of time before most of the big trees disappear.
由于没有幼树来代替它们，大多数大树消失只是时间问题。
An obstacle, setback or delay means only one thing: it's not time for your goal to be completed yet.
一个障碍、挫败或延迟只意味着一件事：现在还不是你实现目标的时候。
The symbolism may come from the fact that the olive tree takes a long time to produce fruit, so olives could only be cultivated successfully in long periods of peace.
它的象征意义可能来自于橄榄树需要很长时间才能结出果实，所以橄榄只能在长久的和平时期才能被成功种植。
They took a long time getting to the top, the only reward for the long years of waiting being that when they had their own newspapers, both knew what they wanted and firmly set about getting it.
他们花了很长时间才达到顶峰，多年等待的唯一回报是，当他们有了自己的报纸，他们俩都知道自己想要什么，并坚定地着手去实现它。
Only then can they hope to describe conditions at the Big Bang, when all space and time was compressed into a volume far smaller than a proton.
只有那样他们才能指望描述大爆炸的情况，所有的空间和时间全部在那时被压缩成一个远小于质子的体积。
I am writing to tell you that we were quite disappointed with your service. We had booked a table, but when we went there at the time as arranged, only to be told there were no seats available.
我想写信告诉你，我们对你的服务非常失望。 我们已经预订了一张桌子，但是当我们按预定的时间去那里的时候，却被告知没有座位了。
Since we only take one step at a time, there is no need to plan our route for one can make continuous decisions about where to turn next.
既然我们一次只走一步，就没有必要计划我们的路线，因为一个人可以不断地决定下一步去哪里。
Workers on part-time contracts who only work 4 to 5 hours a day are happier than those who work full time.
那些每天只工作4到5个小时的兼职员工比全职员工更快乐。
It was like being a mouse, only daring to nibble a little bit at a time.
它就像一只老鼠，一次只敢吃一点点。
Not only does she have a tendency to be moody all the time, but she misses appointments, doesn't follow through on projects, and doesn't seem to plan anything till the last minute.
她不仅有时常喜怒无常的倾向，而且会错过约会，无法坚持完成项目，且似乎不到最后一分钟都不做任何计划。
Soap operas and variety shows were at first available only with a time delay, but in July, TU struck a deal with MBC to provide a live feed.
肥皂剧和综艺节目一开始只能延迟播出，但在7月，TU与MBC 达成协议，提供现场直播。
Both these devices worked well in sunny climates; but in northern Europe, the sun may be hidden by clouds for weeks at a time, while temperatures vary not only seasonally but from day to night.
这两种装置在阳光充足的气候条件下工作良好；但在北欧，太阳可能一次被云层遮挡数周，而温度不仅随着季节变化，而且还随着昼夜变化。
From that time to the present, sails have been used only for pleasure and sporting boats.
从那时起到现在，帆船的用途仅限于娱乐和体育用船了。
She was intending to work part time, but could only manage one day a week in the office due to childcare.
她原本打算做兼职，但因为照顾孩子，她一周只能在办公室工作一天。
Peter only just came in time to prevent the goat from falling down over the very edge.
彼得刚好及时赶到，防止山羊从悬崖边上掉下去。
The mild teacher would only say from time to time: "It seems to me, Peter is not here again!"
这位温和的老师只会时不时地说：“看来，彼得又没有来！”
If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give it a try.
如果你没有时间，只需跑一半的时间就能获得和其他运动一样的好处，所以，我们或许都应该尝试一下跑步。
"At that time the only way to prevent polio was to invent a vaccine," said Gu.
顾说：“那时候，预防脊髓灰质炎的唯一办法就是发明疫苗。”
She also notes that the only time they come down to the ground is to discover another tree with better leaves.
她还指出，他们只有在寻找另一棵叶子更好的树的时候才会来到地面。
You return to your study, only to look again at your phone a short time later.
你回到学习状态中，但没过多久又看了看手机。
What's more, reconstructions might be the only way to know what treasures looked like before time wore them down.
另外，重建可能是唯一能够了解珍宝在受时间侵蚀之前的模样的方法。
For most parents, it can help them save a lot of time because they only have to pick up their children after school.
对于大多数父母来说，这可以帮助他们节省很多时间，因为他们只需要放学后去接孩子。
For most parents, it can help them save a lot of time because they only have to pick up their children after school.
对于大多数父母来说，这可以帮助他们节省很多时间，因为他们只需要放学后去接孩子。
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