虽然有一些顾客来了又走了，但近40年来，这家餐厅的老顾客一直没有变。
Although a few have come and gone, the restaurant's regular customers have stayed the same for nearly 40 years.
过去两年来她的英国口音一直没有变。
炖菜或肉的时候，我们也没有及时将菜出锅，而是会一直炖到肉变的又干又硬才罢休。
Instead of a gentle simmer, we boil our stews and braises until they are tough and dry.
然而，系统中的综合负荷，由于具有构成复杂、随机时变、地域分散等特点，其准确的数学模型一直没有建立起来。
However, for the composite load has the characteristics of complex composition, random time variance and spread over different area, its exact mathematics model is still not built up.
有一句话说，只有工作没有娱乐会让人变傻，这告诉人们应该时而找些乐子，不能一直工作，即使是机器也需要休息。
There is a saying that all work no play makes Jack a dull, it tells people they should find the amusement sometimes, people just can't work all the time, even the machine needs to take a break.
一直以来，没有人认识到这种油的重要性，后来人们发现它可提炼出煤油来，情况才为之一变。
No one, however, seems to have realized the importance of this oil until it was found that paraffin-oil could be made from it;
但是正如这些照片上表现出来的，理发师和顾客42年以来一直都没有变。 。
But, as these pictures show, this scene of barber and client has not changed in 42 years.
但是正如这些照片上表现出来的，理发师和顾客42年以来一直都没有变。 。
But, as these pictures show, this scene of barber and client has not changed in 42 years.
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