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The value changes for your program only, not for GDB itself. value may be any string; the values of environment variables are just strings, and any interpretation is supplied by your program itself. The value parameter is optional; if it is eliminated, the variable is set to a null value.

这个改变只针对你的程序，不影响 GDB 本身。value 可以是任何字符串，环境变量的值仅仅是字符串，任何解释都是你的程序自己的。value 参数是可选的，如果没有，变量会设为空值。

As a result of the scattered structure, the drama is so prolix that the mythos has to be weakened; the visualization of Do Bao looks incongruous, whose character arises ruptures; in the space of realistic narration page, optional alteration to the content desalts "realism".

结构松散，导致全剧篇幅过长，冲淡了戏剧的主题；杜宝的形象前后不一，存在断裂现象；在现实主义的故事情节的板块上，随意编构内容，淡化了"真实性"。

With this effort, the dissertation attempts to prove that context in pun is dynamic and optional and it needs the punster's ingenuity and, more important, the addressee's cognitive effort, to realize its values.

通过这一努力，本论文旨在证明双关语中的语境是动态可选择的，不仅需要双关语创造者的匠心，更重要的是需要解读者的认知努力来实现其价值。

As an optional anti-apoptosis medicine, tetramethy pyrazine shows good effect. It is worth clinic trying and further studying.

作为抗凋亡药物川芎嗪是一个选择，临床上可以试用，也值得进一步深入的研究。

Electronic Development Labs, Inc. recently announced the development of its dual channel pyrometer with optional RS-232 interface.

Electronic Development Labs公司最近宣布其已成功开发出一种高温计。

It's discussed as though it were an optional, quaint and largely irrelevant part of biology.

这种讨论好象是可选择的、离奇的或与生物根本无关的事情。

You don't have to install this radio in your new car, it's an optional extra.

在新车上，你没有必要装收音机了，因为它并不是必须要装的！

You don't have to install this radio in your new car ;it's an extra optional.

不必在你的新车中安装这台收音机，它是可以选装的。

The helicopter can be fitted with a BG-06 radio altimeter, Type 150 single-sideband radio, and KJ-13 autopilot, and can choose the KDF-806 radio compass, KTR-908 radio, and TB-31 intercom as optional.

直升飞机能配备一部BG-06无线电高度计、150型单波段无线电和KJ-13自动驾驶仪，并能选择KDF-806无线电罗盘，KTR-908无线电，同样可选择TB-31对讲机。

The helicopter's cockpit can be fitted with a BG-06 radio altimeter, Type 150 single-sideband radio, and KJ-13 autopilot, and can choose the KDF-806 radio compass, KTR-908 radio, and TB-31 intercom as optional.

直升飞机的驾驶员座舱能够配备有一部BG-06型无线电测高计、150型单波段无线电和KJ-13型自动驾驶仪，并可选KDF-806型无线电罗盘、KTR-908型无线电和TB-31型对讲器。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。