In particular, dairy maids, whose responsibility was to milk cows, and so they had a very intimate relationship with cattle, often didn't get smallpox.
特别是挤奶女工，她们的职责就是挤奶，因此她们与牛有着非常亲密的关系，通常不会得天花。
Mexico has historically had high drop-out rates as poor families pull kids out of school to help put food on the table, and children often sell candy and crafts in the streets or work in restaurants.
历史上，墨西哥的辍学率一直很高，因为贫困家庭让孩子辍学，帮助解决温饱问题。孩子们经常在街上卖糖果和工艺品，或者在餐馆打工。
I've had it (up to here) with him —he's done it once too often.
我受够他了—他这一次太过分了。
Someone traveling alone, if hungry, injured, or ill, often had nowhere to turn except to the nearest cabin or settlement.
独自旅行的人，如果饿了、受伤了或生病了，通常除了最近的小屋或居民点，没有其他地方可以求助。
They were not only curious, but often had a strong desire to control their environment, improve their learning efficiency and increase their own learning resources.
他们不仅好奇，而且往往有强烈的欲望想控制自己的环境，提高自己的学习效率，增加自己的学习资源。
Often the foragers proceeded to the exact spot in the maze where the food had been.
觅食者经常会直接进入到迷宫中食物所处的准确地点。
Unfortunately, the few scientific investigations of yawning have failed to find any connection between how often someone yawns and how much sleep they have had or how tired they are.
不幸的是，少数针对打哈欠的科学调查未能发现人们打哈欠的频率与他们睡觉时长和疲劳程度之间有任何联系。
I had to admit that moving so often made me feel lonely.
我不得不承认，经常搬家让我感到孤独。
While writing the notes, I realized how often I had spent my time on the phone moving from app to app, appreciating other people's lives.
在写这些笔记时，我意识到我有多少次花时间在手机上，从一个软件到另一个软件，欣赏着别人的生活。
His stories were often intriguing, but the information I wanted had to be more than anecdotal.
他讲的故事大多很有意思，但我需要的不仅仅是轶事风格的信息。
It wasn't very reliable, so I often had to climb onto my roof to tweak something.
它并不是非常可靠，因此我常常需要爬上屋顶来解决问题。
Some people went sofa-mad and had them in every room of the house, often several to a room.
有些人得了沙发狂热症，在房子里的每个房间里都要放上沙发，有时候一间房间放几个沙发。
The story goes-- He hated working with child actors but he often had to.
故事是这样的-,他痛恨与童星共事，但又时常被迫合作。
'I was teased and I often had to have time off school because I was sick. This made it even harder for me, and I didn't have a lot of friends, ' she explained.
我常常遭到嘲笑，还经常因为生病不能按时上学，这让我的情况变得更糟，我没什么朋友。
Besides, I hadn't talked to her about it but I assumed that being a streetcar conductor she often had to work evenings and nights.
另外，我没跟她谈起过这件事，但我认为她作为一个有轨电车售票员不得不常常要在晚上和夜里上班的。
Even then, I still often had to debug through the code of the component to actually find the problem.
即使这样，我仍然不得不经常调试组件的代码才能真正发现问题所在。
In earlier trials prosecutors have often had to show that the defendants were responsible for specific, especially grisly crimes.
在早前的审讯中，检方通常不得不证明被告要对具体的、格外可怕的罪行负责。
Since a person feels as though she is wrong to have had these feelings to begin with, she often won't allow a time of tears and loneliness that are necessary for healing.
因为一旦那个人意识到自己开始这段感情是错误的，她常常不会允许自己流泪或者寂寞，尽管这是治愈伤口必须的东西。
Once the infection - caused by one of the bacteria most often resistant to antibiotics - had been diagnosed, doctors put him on five different antibiotics.
一经诊断为感染(由对抗生素产生耐药性的最常见细菌之一造成的)，医生立即使用了五种不同的抗生素对他进行治疗。
Russian aircraft programmes - even in Soviet times - have often had year-end deadlines to complete first flights that came down to the wire.
俄罗斯的飞机项目——甚至在苏联时代——就经常设立年终期限以在最后期限前完成第一批飞机。
In order for them to succeed in business, they have often had to behave like men; this has earned these tough businesswomen a lot of enemies.
为了在职场上获得成功，她们经常需要表现得像男人，这让这些顽强的职场女性树敌颇多。
I had to think fast, and as would so often happen in the years ahead, I turned to Hillary for judgment and advice.
我必须迅速考虑好，在那几年这种事情我一般都是找希拉里商量的，让她帮我做出判断并提出建议。
Such stories mark a big turnaround for diasporas, which over the last century have often had to wage an uphill struggle against time and geography.
这些故事标志着海外犹太人的一个大回转，而在上个世纪，这还必须通过发动一场相对时间与地理的上升抗争才能达到。
Sometimes the system worked well, but the window often had to be resized to display different kinds of documents.
有时系统运行正常，但窗口需要调整大小以显示不同的文件。
Sometimes the system worked well, but the window often had to be resized to display different kinds of documents.
有时系统运行正常，但窗口需要调整大小以显示不同的文件。
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