They both smiled; neither seemed likely to be aware of my absence for long.
他们两个人都笑了，看来都没意识到我离开了很长时间。
His inability to stay at one job for long had finally proved too much for her.
他干什么工作都不能长久，终于让她无法忍受。
If the weather is cold, I wear some warm clothes and go for long walks on the beach.
如果天气冷，我会穿一些暖和的衣服，在海滩上长时间散步。
A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。
At the same time, both cattle and humans were more confined in their movements, staying much closer to permanent water supplies for long periods of time.
同时，牲畜和人类的行动范围都受到了更大的限制，在很长一段时间内都要待在离永久水源更近的地方。
If your only reason for becoming friends with a foreigner is to improve your English, then you will probably find that you don't have a foreign friend for long.
如果你和外国人交朋友的唯一原因是为了提高你的英语水平，那么你可能会发现你交的外国朋友并不长久。
I'll have to work really long hours and be away from my family for long stretches of time, but, on the flip side, I'll get the opportunity to travel around the world.
我将不得不长时间工作并长时间远离家人，但另一方面，我将有机会环游世界。
Many people have begun looking for long-term ways to rein in spending.
很多人已经开始寻找控制开支的长远方式。
Horses used for long-distance riding tend to wear their shoes out more quickly.
用来作长途跋涉的马匹会很快就磨破铁掌。
This question has been in my head for long.
这个问题在我已经想了很久了。
I haven't seen such a novel for long.
我很久没有看过这样的小说了。
They can not live for long periods in cold weather.
它们不能在寒冷的天气中长时间生存。
These 24 people are strangers now, but not for long.
这24人目前都是陌生人，不过很快就不是了。
That makes electric cars not so useful for long journeys.
这使得电动汽车在长途旅行中不那么有用。
You don't have to run fast or for long to see the benefit.
你不需要跑得多快、多久，就能看到好处。
Being lonely for long periods of time is not a great feeling.
长时间的孤独并不是一种好感觉。
Keeping your head bent down for long is not good for your neck.
长时间低着头对脖子不好。
The decision wasn't made by accident and I'd thought about it for long.
做此决定并非偶然，对此我已思虑多时。
Filled with word games, this is a book that won't stay secret for long.
这本书里全是文字游戏，秘密很快就守不住了。
In the 20th century, airplanes replaced trains for long distance travel.
在20世纪，飞机代替了火车进行长途旅行。
"And this," says Dr.Williams, "is good news for long-term space travel."
威廉姆斯博士说：“对于长期太空旅行来说，这是好消息。”
There it remains, sometimes for long periods, before emerging at the surface again.
在那里，地下水在重新涌出地表之前，往往可以保存很长一段时间。
You can go for long walks and swim in the rivers but there are no shops, cinemas or cafes.
你可以散步、在河里游泳，但这里没有商店、电影院或咖啡馆。
Driving through snowstorm on icy roads for long distances is a most nerve-racking experience.
在冰天雪地的道路上长距离驾车穿过暴风雪是一种最惊心动魄的经历。
They have to operate for long periods of time before the costs of development have been recovered.
在收回开发费用之前，它们必须运作很长一段时间。
To keep healthy, doctors and researchers strongly advise that you shouldn't use screens for long hours.
为了保持健康，医生和研究人员强烈建议不要长时间盯着屏幕。
Progress in the development of renewables could be fragile, however, if fossil fuel prices remain low for long.
然而，如果化石燃料价格长期保持低位，可再生能源的发展进程可能会非常脆弱。
He will not do so for long, for mercifully the public has the good sense not to buy the inferior article more than once.
他这样做的时间不会太长，因为幸运的是，公众有良好的判断力，不会不止一次地购买劣质商品。
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