当然，它取消的是程序退出指令。
现在，一个钣金工厂要交叉排产大量的小批量订单，处理最后一刻的订单修改指令，甚至是订单取消等事宜。
A shop may have to juggle numerous small orders and revisions and deal with last-minute changes or even cancellations.
接收者可以要求Future阻止线程，直至一个结果就绪，检测查看它是否完成并取消计算指令，或检查是否有其他进程取消了它。
The recipient can ask the Future to block until a result is ready, poll to see whether it's complete, cancel the computation, or check whether another thread has canceled it.
在交易电脑化之前，错误的交易指令被称为“错误交易”，在进行之前就得以取消。
Before trading was computerised, erroneous orders were known as "out-trades" which could be cancelled before proceeding.
下达的错误指令量级越大，被取消的可能就越大，因为有可能指令涉及的股票数额比市场上可用的股票数额还要多。
The larger the order, the more likely it is to be cancelled as it may be an order larger than the amount of stock available in the market.
在指令到达交易市场前，交易所内的自动系统会发现胖手指失误，或者这类指令会在实现之前被取消。
Automated systems within trading houses may catch fat-finger errors before they reach the market or such orders may be cancelled before they can be fulfilled.
而通过计算机输入的错误指令更难取消，有时根本无法取消。
Erroneous orders placed using computers may be harder or impossible to cancel.
客户承诺，一项指令只可以在其被执行前取消或修改。
The Client acknowledges that an instruction may be cancelled or amended only before execution.
医疗总会已经决定，将来如果医生不理会病人的高级指令，继续给这些病人治疗的话，执业资格将被取消。
The General medical Council has decided that if in future doctors ignore such directives and continue to treat such patients, they will be struck off the medical register.
可以处理各种指令比如取消、改变、生效以及无效。
It manage the orders in the order book, such as canceling, changing, activating, and inactivating orders.
使用指令可以有条件地处理生成文件，显示错误消息，包括其他生成文件，取消定义宏以及打开或关闭某些选项。
Using directives, you can conditionally process your makefile, display error messages, include other makefiles, undefine a macro, and turn certain options on or off.
使用指令可以有条件地处理生成文件，显示错误消息，包括其他生成文件，取消定义宏以及打开或关闭某些选项。
Using directives, you can conditionally process your makefile, display error messages, include other makefiles, undefine a macro, and turn certain options on or off.
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