We can believe the molecular data, the DNA, or we can believe the skeleton trail, but unfortunately, not both.
我们可以相信分子数据和DNA，或者我们可以相信骨架线索，但不幸的是，我们不能两者都相信。
Most marine deposits from around the world contain either plankton or a lot of fern spores but not both together in the same layer.
世界上大多数的海洋沉积物不是含有浮游生物就是含有大量的蕨类孢子，但它们并不是同时存在于同一层中。
Ground up, trees down-why not both?
地上，树上——为什么不是二者皆而有之呢？
A steel mill's ingot goes into a sedan or a skyscraper, but not both.
炼钢炉炼出的钢材可能用来造小轿车或者摩天大楼，但不可能一块钢材两个都造。
Typically you would access database data in either the Web or EJB application tiers, but not both.
通常，您将在Web或EJB应用程序层中访问数据库数据，但不会同时在这两个层中进行访问。
It will be either Ricardo Oliveira or Inzaghi upfront, not both together.
奥利维拉或者因扎吉将突前，但两人不可能同时上场。
A log store should be either a physical log store or a virtual log store, but not both.
日志存储区应是物理日志存储区或虚拟日志存储区，但不能同时为两者。
Both of the memos, Sanderson's and Crowe's, were marked "secret." But they could not both be right.
桑德森和克罗两人的备忘录都被标为“机密”，但不可能两者都对。
PS3 Linux can access either the gigabit wired ethernet or the 802.11g wireless, but not both at once.
PS3Linux既能够访问千兆以太网络，也能够访问 802.11g无线网络，但不能同时访问。
SOA will not succeed at an enterprise level if organizations do not both understand and reconcile these considerations.
如果组织不同时理解和协调这些注意事项，SOA就不会在企业级取得成功。
Configuration of inetd and xinetd is similar but not identical, and a system can run either inetd or xinetd but not both.
inetd和xinetd的配置相似，但是不完全相同。系统可以运行inetd或xinetd，但是不能同时运行两者。
The panel pointed out quite reasonably that the NASA budget allows for either Ares I/Orion or the space station, but not both.
专门小组极为合理地指出，美国宇航局的预算只考虑了“战神Ⅰ号”[火箭]/“猎户座”[太空飞船]与空间站两者之一，却未兼顾两者。
For the element defined in Listing 3, you can specify a rule where timer has either a time or iterations attribute but not both.
对于清单3中定义的元素，可以指定一个规则，根据这条规则，timer可以具有time或iterations属性，但不能同时拥有两者。
Whichever means of setting properties you prefer, it helps to be consistent — try to use one technique or the other but not both.
无论您更喜欢哪种设置属性的方法，保持一致都是有帮助的——尽量使用一种技术或另一种技术，但是不要同时使用两种技术。
You can get a proper exposure for shadows, or propper exposure for bright areas, but often, not both, and that can be a good thing.
你可以为暗部获得适当的曝光，或者为亮部获得适当的曝光，但通常你无法两者兼得。
To say, "I am a subjectivist," or "I am an objectivist," is in my opinion like saying, "I am a seer," or "I am a listener," but not both.
在我看来，说“我是个主观主义者”或者“我是个客观主义者”就如同说“我是个先知”或者“我是一个倾听者”，但两者并非一致。
I had made up my mind about a week before a party that I was going to, to be either a woman or Abraham Lincoln5, but definitely not both.
在我要参加的那个万圣节派对开始前一个星期，我就已经下定决心，我要不就打扮成一个女人，要不就化妆成亚伯拉罕·林肯，但决不会二者混搭。
Because we often see cats that have one, but not both, of these conditions, this is undoubtedly because of each cat's unique genetic make-up.
我们经常看到猫得其中一种病而不是同时都患，这种情况显然是因为每只猫各自独特的基因构成造成的。
For example, the expression a*\|b*c will match a string consisting of any number of as or any number of bs (but not both) terminated by a single c.
例如，表达式 a*\|b*c匹配由任何数量的a或b 组成（但不是同时）且以一个 c 结尾的字符串。
Party promisesare those "plans" you make at the end of social gatherings where one, if not both, promiser never actually intends on following through.
“派对诺言”或“聚会上的约定”）指的是在某个社交聚会结束时跟别人做出的“约定”，但约定的一方，甚至双方，其实并没有打算真正履行这个约定。
One thing to note is that a WebSEAL server can be configured to either support basic access authentication or form-based authentication, but not both.
有一点需要注意，可对WebSEAL服务器进行配置，以便要么支持基本访问认证，要么支持基于表单的认证，但是二者不同时受支持。
Party promises are those "plans" you make at the end of social gatherings where one, if not both, promiser never actually intends on following through.
“派对诺言”或“聚会上的约定”） 指的是在某个社交聚会结束时跟别人做出的“约定”，但约定的一方，甚至双方，其实并没有打算真正履行这个约定。
Party promises are those "plans" you make at the end of social gatherings 1 where one, if not both, promiser never actually intends on following through.
“派对诺言”或“聚会上的约定”指的是在某个社交聚会结束时跟别人做出的“约定”，但约定的一方，甚至双方，其实并没有打算真正履行这个约定。
You should always create a couple of generic images, one JPEG and one GIF, because some devices will accept JPEG images, and some will accept GIF, but not both.
您应该创建两张普通图片，一张是jpeg格式的，另一张是gif格式的。因为有些设备接受jpeg格式的图片，另一些接受gif格式的，而不是两者都接受。
In this case, it is possible to start one database (database a or database b) at any given time, but not both simultaneously, given the above database configuration parameters.
在这种情况下，按照上面的数据库配置参数，在任何时刻启动某一个数据库(数据库a或数据库b)是可行的，但是不能同时启动两个数据库。
But I can't help recalling the words of the eminent economist who said he was willing to forecast a number or a date — but not both — because it made it too easy to prove him wrong.
但是，我还是忍不住会想起某位著名经济学家的话。他说，他宁愿只预测一个数字或者一个日期，而不是同时预言二者，因为那样的话，很容易出错。
Keep in mind, however, that most text-mode tools resize either partitions or file systems, but not both; you must combine both types of tools to resize a partition and its file system.
然而，您要记住多数文本模式工具要么可以调整分区，要么可以调整文件系统大小，但是不能两个同时调整；您必须将两种工具合并到一起来调整一个分区及其文件系统。
Keep in mind, however, that most text-mode tools resize either partitions or file systems, but not both; you must combine both types of tools to resize a partition and its file system.
然而，您要记住多数文本模式工具要么可以调整分区，要么可以调整文件系统大小，但是不能两个同时调整；您必须将两种工具合并到一起来调整一个分区及其文件系统。
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