通常情况下，需求会在项目的生命周期内发生变化，即使没有别的原因，交付项目所需的时间也常常会超出业务修改所需的时间。
More often than not, requirements will evolve over the life of the project, if for no other reason than the time it takes to deliver a project often exceeds the time businesses need to make changes.
专家们说，没有理由恐慌，不过注意还是应该的，原因是细菌的传播常常与厕所不干净和人体排泄物中的细菌有关。
Experts say there's no reason to panic — even though there may be good reasons to be grossed out, since the spread of germs is often linked to poor bathroom hygiene and bacteria from human waste.
咀嚼问题常常是夜间磨牙症的一个原因，检查有没有牙齿损伤是个不错的方法。
Bite problems are often a cause of bruxism, and it's a good idea to check for damage to your teeth.
大多数UNIX系统会尝试用空闲内存执行缓存，这就是系统常常看起来没有空闲内存的原因。
Most UNIX systems try to use free memory for caching, which is why it often looks like your system has no free memory.
没有足够的材料信息常常是人们拖延决策的原因，但是人们却通常没有意识到由此而产生的结果就是决策的拖延。
This is often the reason people put off decisions, but they don’t always realize it. As a result, they sit on a decision for awhile.
许多人类文化可以证明，常常会有多种的可能性，这好像没有什么原因去接受一个唯一的未来。
As the variety of human cultures attests, there have always been multiple possibilities, and there seems no reason to accept a single vision of the future.
应用程序常常没有嵌入高内聚和低耦合的原则的原因与现实的软件开发过程有关。
The reason that applications frequently fail to embody the principles of high cohesion and low coupling relates to real-world software development processes.
其实我常常看你空间的原因只是我想看看有没有关于我的。
In fact, I often see your space because I want to see if there is nothing about me.
我常常听到成年人说，尽管我希望能集中注意力听演讲或读书，但往往做不到，其原因就是年轻时没有养成这种习惯。
I often hear grown-up people say, I could not fix my attention on the lecture or book, although I wished to do so, and the reason is, the habit was not formed in youth.
我常常听到成年人说：“尽管我希望能集中注意力听演讲或读书，但往往做不到。”其原因就是在于年轻时没有养成这种习惯。
I often hear grown-up people say, "I could not fix my attention on the lecture or book, although I wished to do so," and the reason is, the habit was not formed in youth.
我常常听到成年人说：“尽管我希望能集中注意力听演讲或读书，但往往做不到。”其原因就在于年轻没有养成这种习惯。
I often hear grown-up people say "I could not fix my attention on the sermon or book, although I wished to do so", and the reason is, the habit was not formed in youth.
我常常听到成年人说：“尽管我希望能集中注意力听演讲或读书，但往往做不到。”其原因就在于年轻没有养成这种习惯。
I often hear grown-up people say "I could not fix my attention on the sermon or book, although I wished to do so", and the reason is, the habit was not formed in youth.
应用推荐