This is caused by the fact that the parser uses backtracking to parse the code, i.e. they try many if not all possible combinations of outcomes until they figure out the right one.
这是由于解析器使用回溯来解析代码，例如，它们会尝试诸多结果的组合直到找到正确的那一 个。
It's just not physically possible to finish all this by the end of the week.
要在本周末完成这一切，这在客观上是办不到的。
The Internet, cell phones and airplanes are all technological advances that people use everyday and would not be possible without students of math and science inventing them.
互联网、手机和飞机都是人们日常使用的技术，如果没有数学和科学专业的学生发明它们，这些技术进步是不可能实现的。
“All our lawyers told us this was not possible,” says a person close to the company.
“我们所有的律师都说这是不可能的，”一个与该公司关系密切的人透露。
To minimize form complexity, not all of the possible attributes for these form components are surfaced.
为了降低表单的复杂性，没有显示这些表单部件的所有可能属性。
This is not what was intended, and it might not be possible on all JVMs or platforms, but it was allowed by the old memory model specification.
这并不是我们所想要的，而且在所有JVM或平台这是不可能的，但是旧的内存模型规范允许这样做。
It is not possible to disable interrupts across all processors.
禁止所有处理器的中断是不可能的。
This is optimized not for that common case but for all possible cases.
这不是通常情况的最佳化,而是各种可能的情况。
If all possible solutions are not investigated, you can easily shortchange yourself and possibly use a more expensive solution than was required.
如果没有研究所有可能的解决方案，很可能会作出片面选择，有可能使用比所需更昂贵的解决方案。
Still, the committee says quickly securing all buildings would not have been possible.
不过，该委员会说迅速保护全部大楼本来就不可能。
However, it is often not possible to meet all of the expressed needs.
然而，要满足所有需求往往是不可能的。
It's also possible that our experience was not at all representative of the charm and ingratiating qualities pit bulls can demonstrate.
当然也有可能，即，以我们的经历，还够不上匹配斗牛犬所表现出来的那种迷人魅力以及谄媚能力。
All of that is possible, but not a Slam Dunk by any stretch.
这一切都是可能的，但不会是一锤定音。
You may want to put plans for building that flux capacitor on hold: a "toy" big bang created in the lab suggests time travel may not be possible after all.
也许你要把建造通量电容器的计划搁置下来：实验室下的大爆炸理论模型表明时间旅行也许根本不可能。
Suppose your boss tells you that it is possible that not all items in an order will be shipped at once.
假设您的老板告诉您可能无法立即发送订单中的所有商品。
Often it is not possible to remove all references to instances, classes or classloaders completely from the JVM.
但是通常情况下，从JVM中彻底删除对所有实例、类或classlodar的引用是不可能的。
Restrict account switching: If at all possible, do not configure sudo to allow users to switch to another account.
限定帐号切换：只要有一丝可能，就不要配置sudo允许用户切换到其他帐号。
This is not an "all or nothing" proposition, however, as it is possible to upgrade some modules and not others.
但是，这不是一个“全是或全否”的命题，因为有可能只升级某些模块而不升级其他模块。
It is not possible to have the best of all worlds.
你不可能拥有世界一切最好的东西。
It will not be possible to cover all those classes.
在这里不可能介绍所有这些类。
But the authors acknowledged that they could not account for all possible variables, and cautioned that it was an observational study that draws no conclusions about cause and effect.
不过，作者们承认未能一一证明所有可能的变化因素，并提醒这是项观察研究，不能就此得出这两者之间存在因果关系的结论。
And, while it may not be appropriate to expose all possible configuration fields to the user, developers don't always know what Settings are best for a final deployment.
而且，虽然将所有可能的配置字段都公开给用户也许并不合适，但是开发人员并非总是知道怎样的设置对于最终的部署才是最好的。
Adopting operating system virtualization for all test types is not possible because of dependencies.
由于依赖关系的原因，不可能对所有测试类型都采用操作系统虚拟化。
It may or may not be possible to fix all of the issues, or completely improve test coverage, but understanding the problem will help you plan for the future.
有可行修正全部问题，也可能不能完全修正，或者完全改善测试的覆盖率，但是对问题的理解有助于您对未来的规划。
Although collocated tables typically achieve the strongest performance, it is not possible in practice to collocate all tables.
虽然经并置的表通常都会获得最健壮的性能，但是在实际中，不太可能对所有表都进行并置。
When a critical application is down at 2:00 AM, it is possible that not all changes made while attempting to bring the application back online are documented – or reverted if not required.
当一个关键应用程序在 2:00 AM 关闭时，企图使该应用程序返回在线状态而进行的所有更改有可能不会被全部记录 —或者恢复，如果不必要的话。
He did not convince me that all my dreams were possible: I convinced myself!
他并没有说服我我所有的梦想都能成真：我说服了自己！
TVs, computers and other gizmos should not be in your bedroom if at all possible.
卧室中尽量不要放电视机，电脑和其它一些小玩意儿。
Unification may not be possible - To get all the characteristics of data consistent is seldom possible.
可能无法实现统一-使数据的所有特点一致几乎不太可能实现。
Unification may not be possible - To get all the characteristics of data consistent is seldom possible.
可能无法实现统一-使数据的所有特点一致几乎不太可能实现。
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