但在受火灾保护的实验区，一些多年生草本植物最终占据了主导地位，超过了其他所有植物。
But in experimental areas protected from fire, a few perennial grass species eventually come to dominate, outcompeting all others.
诚然，一些国家已经开始着手解决这个问题，但在所有海洋都变成死海之前，我们必须找到合理的捕鱼方式，这一点至关重要。
True, some countries are beginning to deal with this problem, but it is vital we find rational ways of fishing before every ocean becomes a dead sea.
我已经存了一些钱以备不时之需，但在我们走之前，我可能还要再多挣点。
I've got a little put aside for a rainy day, but I might need to earn a little more before we go.
我已经存了一些钱以备不时之需，但在我们走之前，我可能需要多挣点钱。
I've got a little put-aside for a rainy day, but I might need to earn a little more before we go.
世界人口继续增加，但在一些地区人口正在下降。
The population of the world continues to increase, but in some areas the population is falling.
虽然他在面试前就做了充分的准备，但在一些重要的问题上他却没有回答上来。
Though he had prepared well before the job interview, he failed to answer some important questions.
在1837年大恐慌前的10年里，劳工运动积累了一些势头，但在随后的大萧条中，劳工的力量崩溃了。
The labor movement gathered some momentum in the decade before the Panic of 1837, but in the depression that followed, labor's strength collapsed.
如果它有自己的IP地址，那么我们就可以在网络上使用接入点本身了；这样做的安全性要差一些，但在用于演示方面会更有趣。
If it has its own IP address, we can use the access point itself over the network; this is less secure, but more fun to use for a demo.
这本书不是很有趣，但在书页之间确实有一些有意思的东西。
The book wasn't very interesting, but between its pages there was something very interesting indeed.
但在我们试图模仿天才或鼓励我们的孩子这样做之前，我们应该注意到，我们从他们身上学到的一些东西可能并不适合我们。
But before we try to emulate geniuses or encourage our children to do so we should note that some of the things we learn from them may prove unpalatable.
一个特定元素的同位素具有相同的化学特征，但在物理性质上有一些细微差异。
The isotopes of a given element have the same chemical properties but slightly different physical properties.
在一些地方，你可以想借多少书就借多少，但在其他地方，你只限于借阅一定数量的书几个星期，这样你可以有足够的时间读完所有已借的书。
In some places, you may borrow as many books as you want, but in others you are limited to a certain number of books for several weeks so that you can have enough time to finish all the books you've borrowed.
在许多国家，这发生在你18岁生日那天，但在世界的某些地方，你必须做一些特别的事情才能进入成人的世界。
In many countries, it happens on your 18th birthday, but in some parts of the world, you have to do something special to enter the world of grown-ups.
在过去的十年里，尽管收入不平等的现象有所加剧，但在育儿方面的一些社会经济差异，比如为孩子朗读书籍、陪孩子去图书馆，已经在缩小。
In the past decade, even as income inequality has grown, some of the socioeconomic differences in parenting, like reading to children and going to libraries, have narrowed.
虽然我们需要等待更长的时间才能收到信，但在今天这个繁忙的世界里，我们需要一些值得等待的东西。
Although we have to wait longer for our letters, in today's busy world we need something that is worth waiting for.
但在某一点上，他说，他们做出了一些不幸的选择。
But at some point, he says, they made some unfortunate choices.
总的来说，乘飞机是非常安全的旅行方式，但在一些国家要比其它国家更为安全(见表7)。
By and large flying is a particularly safe way to travel, but more so in some countries than in others (see chart 7).
但在一些情况下，这些电影可以像以前那样，通过附带广告免费供用户观看。
However, in some cases, the movies could be available in way that they have been previously - free, with advertising.
但在困难的问题上，他遭遇了一些严峻的现实。
But on the hardest issues he is bumping up against some harsh realities.
但在一些地方，体罚已经少些了，目前正有个彻底叫停体罚的机会。
But in some places, it happens less than before, and there is a chance to stop it altogether.
但在开始讨论之前，您需要理解这个领域的一些术语。
Before I get started, though, you'll need to understand some of the terminology used in the field.
但在这种绝望的环境下，我们仍可见到一些积极的迹象。
Yet in this unpromising setting, some positive signs are visible.
好的，找找感觉，但在这之前，我还是躲远一些。
Okay, get some feel for it, but before you do it make sure that I'm out of the way.
为分区和复制指定一些设置，但在其他方面接受所有的缺省设置。
Specify some Settings for partitioning and replication, but otherwise accept defaults for everything else.
一些问题可能极其重要(“你是否曾谋杀别人？ ”)但在分类筛选上没什么用。
Some questions might be of utmost importance (" Have you ever murdered anyone? ") but of little use, in sorting people.
但在您的客户机接收XML时，您需要了解一些特殊的考虑事项。
However, you need to know about some special considerations when your client receives XML.
在冬天，西红柿相对少一些，但在市场上还是可以买到的。
In winter, tomatoes are fewer, but you can still buy them on the market.
但在目前正在瑞典举行的“世界水周”会议上，他们已披露了一些早期的研究发现。
But at the World Water Week, a conference now underway in Sweden, they have revealed some early findings.
但在目前正在瑞典举行的“世界水周”会议上，他们已披露了一些早期的研究发现。
But at the World Water Week, a conference now underway in Sweden, they have revealed some early findings.
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