Similar to multithreading, this presents a testing challenge: in a normal environment, the packets tend to arrive in perfect order, and the perturbation-handling functionality is not actually tested.
与多线程相似，这带来对测试的挑战：在正常环境中，分组往往是按正确的顺序到达，实际上并没有测试混乱处理功能。
You will also learn how to limit the user's choice of search parameters by placing a combo box on the page: this presents a list of selections to the user instead of allowing them to type in a string.
通过在页面上放置一个组合框，您可以限制用户对搜索参数的选择：组合框将向用户提供一组固定的选择，而不是任由他们直接输入一串字符。
If all the commands on a given menu are unavailable to the user, it is considered good programming practice to both hide and disable the entire menu, as this presents a clean user interface.
如果给定菜单上的所有命令对于用户都不可用，则隐藏并且禁用整个菜单是一种良好的编程方法，因为它显示的是干净的用户界面。
This presents a practical solution.
这确实是一个实际的解决方法。
这产生一个悖论。
This presents a problem of managing an ever-growing set of business data assets.
这引发了一个问题就是必须管理不断增长的一套业务数据资产。
This presents a threat to Banks, says Dan Schatt, of Celent, a research company.
金融服务咨询和研究公司Celent的高级分析师丹-斯科特(DanSchatt)称，这将对银行构成威胁。
This presents a lovely scene: a grassy plateau spotted with dark juniper bushes and scattered nomad tents.
这时，展现在眼前的是一幅十分可爱的景象：草甸高原上点缀着一片片暗色的杜松树丛，其间有散落的游牧人帐篷。
This presents a lovely scene: a grassy plateau spotted with dark juniper bushes and scattered nomad tents.
眼前出现了一副美丽的风景：草绿色的高原上点缀着黑色的灌木丛和牧民的帐篷。
This presents a charming red Merlot with aromas of fresh red berries, especially raspberries, plums and tobacco.
这款梅乐呈现迷人的红色，带有新鲜红色浆果的香气，特别是覆盆子，李子和烟草。
Resource in WANET is seriously limited, such as bandwidth constraints and energy constraints etc. This presents a serious challenge to design routing strategies for WANET.
WANET网络具有严重的资源限制特点：如带宽限制、能量限制等，同时这些资源提供的浮动性很大，这就给WANET网络的路由策略提出了严峻的挑战。
This presents a problem for JVM implementers: if locks are only held for a short time, then spinning is more efficient; if locks are held for a long time, then suspension is more efficient.
这向JVM实现人员提出了一个问题：如果锁只被持有很短的时间，那么旋转会更有效率；如果锁持有很长时间，那么暂挂会更有效率。
This presents a problem for JVM implementers: if locks are only held for a short time, then spinning is more efficient; if locks are held for a long time, then suspension is more efficient.
这向JVM实现人员提出了一个问题：如果锁只被持有很短的时间，那么旋转会更有效率；如果锁持有很长时间，那么暂挂会更有效率。
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