On the one hand, if the body doesn't have enough cholesterol, we would not be able to survive. On the other hand, if the body has too much cholesterol, the excess begins to line the arteries.
一方面，如果身体没有足够的胆固醇，我们将无法生存；另一方面，如果体内胆固醇过多，多余的胆固醇就开始让动脉变厚。
There is no human supervision, but an attendant will be on hand to accept cash and explain the system to newly users.
这里没有人工监督，但会有一名服务员在现场接受现金，并向新用户介绍系统。
There is a price to be paid in that it is a delicate crop that cannot be lifted by machine or it will be bruised and rot, so has to be hauled by hand which is expensive.
这是要付出代价的，因为这是一种脆弱的农作物，不能用机器采摘，否则就会被压伤和腐坏，所以必须采用手工拖运，这是非常耗钱的。
Both native and exotic species can become invasive, and so they all have to be monitored and controlled when they begin to get out of hand.
本土物种和外来物种都有可能成为入侵物种，因此当它们开始失控时，我们必须对它们进行监视和控制。
None of this is likely to be on hand if you cannot even afford to mend the dismally few highways you have.
如果你甚至不能承担惨淡的几条高速公路的维修，那么这些都不太可能发生。
He is chosen by blind chance (beneath which lurks the hand of destiny, of course), to be the hero to save his city, and succeeds.
他被盲目地(当然，这背后潜藏了命运之手)选为挽救他城市的英雄，最后成功了。
On the other hand, you might be wise to begin with research if you intend to tackle an issue you do not fully understand.
另一方面，从调查开始也许会是一个明智的选择，如果你打算去解决一个你并不是完全懂的问题。
One partial or short-term solution would be to prepare brochures in English and other languages to hand out to visitors when they purchase tickets.
作为部分的、短期的解决办法就是准备出英语和其他语言的小册子，在外国参观者买门票时发给他们。
Another solid parishioner presses his card into his hand, murmuring that he hopes to be of service to him in the future: he is an undertaker.
另一个看法一致的居民把名片压到家具商的手上，低声说他希望将来能为其服务——他是一名殡葬承办者。
After all, should we be expected to hand over to our manager the passwords to our personal email accounts where we gripe to our friends about work?
毕竟，我们应该把个人电子邮件帐户的密码交给经理吗？我们可是在上面向朋友大吐工作上的苦水。
The authors wish you to read it with a pencil in your hand, for you will often be asked to make certain notations, to write answers to particular questions.
作者们希望你在读这本书的时候手里要拿上一支铅笔，因为我们要求你经常做点笔记，或是将一些具体问题的答案写下来。
So far, the all-important lesson would seem to be: have sufficient emergency power at hand to keep cooling water circulating in the reactors to prevent a meltdown.
到目前为止，这场灾难给我们最大的教训可能是，我们手中必须准备足够的紧急电源来保持反应堆水循环的温度，阻止反应堆融化。
If you think waving your phone to pay for something is convenient enough to convince you to go to one coffee shop versus another, imagine how thrilled people will be to simply raise their hand?
如果你认为挥挥你的手机去咖啡馆喝咖啡是非常帅的事情，想象一下另一个满脸红光的人在你身边只是简单的举了下手。
Here is the paradox. On the one hand, to be a good mechanic seems to require personal commitment: I am a mechanic.
这里有一个悖论：一方面，作一个优秀的机修工需要个人全力投入，我是一个机修工。
On the one hand, we tend to agree that people should be able to access whatever information they'd like in a free society.
一方面，我们似乎都认同在一个自由的社会里公民可以获取他们想要的任何信息。
The only real solution appears to be to hand over the night shift to a corps of permanent night workers whose nocturnal wakefulness may persist through all weekends and holidays.
唯一能解决问题的方法是将夜班交给一些长期从事夜间工作的人,,他们在周末和假期依然会保持警醒状态.
"Light touch" regulation, which gave bank bosses plenty of room provided they seemed to know what they were doing, is to be replaced with a much heavier hand, but it is attached to the same people.
“轻触”的规定曾经给了银行的老板们足够的空间以供他们知道专家们在做什么，如今替换成一个更重的手，但它是连接到同一人。
Is it any less compelling a moral obligation, in the name of all children now and in the future, to report that we are on track to hand over a planet that may be destroyed for generations to come?
这是个多少有些引人注目的道义责任，以所有儿童现在和将来的名义，报道我们正在交出地球的轨道上，有可能破坏我们的世世代代吗？
My goals tend to be general; I define success according to the job at hand.
我只有大致的目标，我认为是否成功取决于手头上的工作。
A cloth covered the lower arm up to the shoulder to obscure which hand might actually be connected to the body.
一件衣服盖在前臂直到肩膀上，来遮掩哪只手是真的和身体连接的。
Think how it must feel to be alone in New York, without a friend or relation at hand, with no one to know or care what to do.
想一想一个人在纽约是什么感受，身边没有一个亲戚朋友，没有人知道你做什么，也没有人关心。
Even a company that is shown to be profitable according to accounting standards can go under if there isn't enough cash on hand to pay bills.
即使一家按照会计准则显示盈利的公司要是手头上没有足够的现金支付账单的话也会失败。
For example, we had to be sensitive to the child's height or the size of their hand and matched the work to their physical and mental abilities.
比如，我们不得不认真考虑孩子们的体重和手的大小，分配给他们与身体条件和心智条件相匹配的工作。
On the other hand the alias "fo:" defines the elements to be aggregated to the original XML aiming to define page layout (XSL-FO Recommendation).
另一方面，别名“fo:”定义将被聚集为原始XML的元素，用以定义页面布局（XSL-FO 推荐标准）。
Hannah didn't forget about her promise. When Samuel was three years old and weaned, she took him to Eli to be trained in God's hand.
她并没有忘记自己对上帝的承诺，当撒母耳三岁断奶后，哈拿把他送到伊莱那儿去受训。
Matches tools with roles and tasks: tools should be targeted to the task at hand and to the role of the person who performs that task (for instance, business analyst or it architect).
为不同的角色和任务匹配相应的工具：工具应该使完成任务更为容易，并且是适合于执行这个任务的角色的(比如，业务分析师或者IT架构师)。
Matches tools with roles and tasks: tools should be targeted to the task at hand and to the role of the person who performs that task (for instance, business analyst or it architect).
为不同的角色和任务匹配相应的工具：工具应该使完成任务更为容易，并且是适合于执行这个任务的角色的(比如，业务分析师或者IT架构师)。
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