上下文的的英文：
contextual

The proxy firewall maintain context more easily than the packet filter firewall.
代理防火墙比包过滤器防火墙易于保持更多的上下文

During a logon attempt, the user's security context accumulated too many security IDs.
在尝试登录的过程中，用户的安全上下文积累了过多的安全标识。

The naming context could not be found.
找不到命名上下文。

preserved context indexing system,PRECIS
保留上下文索引系统

The context has expired and can no longer be used.
上下文已过期，不能再用了。

The naming context could not be found in the cache.
在缓存中找不到命名上下文。

Invalid device context (DC) handle.
无效的设备上下文(DC)句柄。

This sentence does not seem to connect with the context.
这个句子似乎与上下文脱节。

The root object must be the head of a naming context.
根目录对象必须是一个命名上下文的头。

The cross reference for the specified naming context could not be found.
找不到指定的命名上下文的互交参考。

A temporal-contextual theory of the recency effect is discussed.
讨论了新近效应的一种时间-背景的理论。

Recently, Apple has admitted the importance of right-click contextual menus.
最近，苹果公司承认了右键情境菜单的重要性。