单一实例指的是旨在让应用程序中一次只存在一个实例的类。
Singletons are classes that are designed to have only one instance existing at a time in an application.
不过这样做有一个问题就是一整天只吃水果和沙拉有些口味太单一了。
But consistently eating raw is a challenge if you don’t want to eat very boring meals all day long like fruit and salads.
这可能只包括一个像运输或仓储或单一服务可以包括一个完整的供应链整合。
This may include only a single service like transportation or warehousing or could include a complete integration of the supply chain.
当两个目的地在同一个消息传递系统中时，接收和发送可以在一个简单事务中进行，这是因为它们只涉及单一的事务资源。
When the two destinations are in the same messaging system, the receive and send can be done in a simple transaction because they involve a single transactional resource.
即使一个程序只包括一个在单一处理器上运行的单线程，一个同步的方法调用仍要比非同步的方法调用慢。
Even when a program contains only a single thread running on a single processor, a synchronized method call is still slower than an unsynchronized method call.
但其中许多国家只承诺了一个区间，而不是一个单一的目标。
But many, rather than committing themselves to a single target, have pledged a range.
跟一个很牛逼的敌人对抗也只不过等下看它又爬起来，或者感觉就像你今日做了的最重要的事竟然是杀了十只老鼠，这样只会让游戏变得枯燥单一。
Fighting an epic enemy only to see him respawn a moment later, or feeling as if the most important thing you did today was murdering ten rats, can cause a game to have a flat, repetitive feel.
开发环境不会只包含来自一个供应商的数据库，一个组织中的应用程序不会只使用一个单一数据库访问方法。
Development environments rarely comprise databases from a single vendor, and applications in an organization rarely use a single database access methodology.
你也能让生活简单一点，不是只存文件名，而是在字段里面存一个Reader对象。
You can still make your life a little easier by storing not just the filename, but a Reader object in the Field.
而且，如果访问者搜索同样的事情不止一次地在一个单一的访问，搜索将只计算一次。
And, if a visitor searches for the same thing more than once during a single visit, the search will only be counted once.
这将带来便利，因为如果我们只使用了单一的文件，我们仅仅需要一个文件操作句柄，这样我们就无需消耗过多的系统资源。
This comes in handy, because if we use only one file, we need only one File Handle, and so we won't exhaust too many System Resources.
帮助经常以不被期待的方式显现，所以不要只看一个或其他的单一方面，而是留意所有的可能性。
Help often comes in unexpected ways so do not specifically demand one way to another, but leave all possibilities open.
但是，由于这是一组紊乱性疾病，并不能只寻找任何一个单一症状。
But since these are a group of disorders, there is no one single sign to look for.
在节点上只找到一个网络适配器。请添加另一个网络适配器以避免单一故障点。
Only one network adapter was found on the node. Add another network adapter to avoid a single point of failure.
设计秘耳时，保持它们的永往无前性，它们只为了一个目的而生，所以可能的话，只给它们单一的异能。
When designing a Myr, keep it straightforward-they're built for a single purpose, so when possible, give them a single ability.
可以看出，海床的深度是10米范围内整个项目区，只通过一个单一的轮廓线，这意味着海床的面积是合理的水平。
It can be seen that the depth of seabed is within 10 meters throughout the project area, and it only passes a single contour line, meaning that the area of the seabed is reasonably level.
与一个公众尤其是有争议的问题相关的，把其它所有因素、关心、事实和问题排除在外的，与这个单一问题有关的，或只关心这个问题的。
Of, relating to, or concerned with only a single public, especially controversial, issue, to the exclusion of all other factors, concerns, facts, and issues.
奖项将只承认英雄主义的杰出成就或单一行为，不会持续的业务活动承认了对一个武装的敌人。
Awards will be made only to recognize single ACTS of heroism or extraordinary achievement and will not be made in recognition of sustained operational activities against an armed enemy.
单一规则规定每个文件应该只放一个组件。
The Rule of 1 states that there should be one component per file.
一旦你选择了单一税率，您可能只恢复到双率，如果你有一个与你的新室友移动。
Once you have selected the single rate, you may only revert back to a double rate if you have a new roommate move in with you.
一个承包商如果没有相关的合同履行历史，就不能被认为是负责任的或是只负单一责任，除非特殊采购确定的特殊标准在外。
A prospective contractor shall not be determined responsible or non-responsible solely because of a lack of relevant performance history, except when specified in a standard for special acquisitions.
虽然实现可能有在一个系统中是唯一的线程ID，应用程序应该只假定线程id在一个单一的过程是可用的，独特的。
Although implementations may have thread IDs that are unique in a system, applications should only assume that thread IDs are usable and unique within a single process.
只按一个单一的按钮即可进行自动跟踪，瞬时初始化被观测者头部位置，眼睛位置和眨眼率，；
Automatic tracking, allowing instantaneous subject initialisation of head position, eye location and blink rate, with the click of a single button;
只按一个单一的按钮即可进行自动跟踪，瞬时初始化被观测者头部位置，眼睛位置和眨眼率，；
Automatic tracking, allowing instantaneous subject initialisation of head position, eye location and blink rate, with the click of a single button;
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