Subtracts the specified time or duration from this instance.
从此实例中减去指定的时间或持续时间。
Firstly, null was accepted by a number of the Joda time APIs to refer to 0 time or duration.
首先，很多Joda TimeAPI都接受null值来表示0时间或是间隔。
By contrast, the audience encounters an opera or a play over a specific time, which is the duration of the performance.
相反，观众可以有一段具体的时间来欣赏话剧或者戏剧，这段时间就是表演的持续时间。
Delete any data older than this time. NULL or the duration these results should be kept.
删除任何早于这个时间的数据空值，或指定保留结果的期限。
Business processes can execute their activities in sequence or in parallel, over a very short period of time, or a much longer duration spanning days, weeks or longer.
业务流程可以按顺序或并行执行它们的活动，执行期限可以是较短的时间，也可以是跨数天、数周或更长的时间。
This period of time is often called duration or interval.
这个时间周期通常被称为持续时间或者时间间隔。
In the details for the activity, you can simply specify a duration to wait, or you can specify a specific time and date when the process should continue to run.
在等待活动的详细信息中，您只需指定要等待的时间，或指定流程要继续运行的特定时间和日期即可。
Also, a set of component extraction functions allows one operation, with a readable name, to get one field out of a date, time, or duration. For example, compare.
此外，还有一组名称浅显易懂的分量抽取函数，只要一个操作就能从日期、时间或时期数据中抽取一个字段。
DurationLabel: Identifies the duration that is associated with the Constant value specified if the partitioning key column has been assigned a date, time, or time stamp data type.
DurationLabel：如果分区键列的数据类型是日期、时间或时间戳，这个参数指定与Constan t值相关的时间单位。
Each iteration should have a clear duration based on a time period or milestones achieved.
每次迭代应该具有基于时间范围或实现的里程碑的明确持续时间。
If needed, create another new database to store holiday information for an entire year or for a specified time duration.
如果需要，创建另一个新的数据库以存储整个一年或者特定时间段内的假期信息。
Publishers in negotiations with Amazon, or whoever, say they want two-year contracts because there's such flux, but at the same time are asking authors for the duration of copyright.
和亚马逊等网站协商的出版商表示，由于情况不稳定他们希望签订两年期合同，与此同时却对作者提出版权期限的要求。
Once you get used to the process, increase the frequency and/or duration, but it’s more important that you keep at it over time than it is that you’re consistent in intensity over time.
等到你已经习惯了之后，再增加次数和强度，但最重要的是保持这个习惯而不是每次都要求保持强度。
Smile at two neighbors. However, it’s hard to concentrate on these five improvements for a long duration of time, and inevitably, one or two will get lost in the shuffle.
然而，想要长时间的集中这5件小事并坚持下来，却很难，总会有一两件在混乱中不可避免的被遗漏掉。
Or enter values of your choice for Start Time and End Time from within the test run duration.
或者为测试运行期间的起始时间和终止时间输入一个值。
If you have more than 10 open issues on your issues list, you should consider shortening the discussion time, prioritizing the list further, or expanding the meeting's duration.
如果你清单上未解决的问题超过十个，就应该考虑缩短讨论时间、进一步排列优先次序或者延长会期。
Hardest hit will be "non-regular" workers-those who work part-time, as day-labourers, for a fixed duration, or under agency contracts.
最受打击是非合同工——他们同临时工一样，在固定的时间兼职，待遇低于合同工。
Gets or sets the time duration during which the page or control is cached.
获取或设置缓存页或缓存控件过程的持续时间。
Users can set a timer to shutdown their PC after specific time duration or for a specific date and time.
用户可以设置一个计时器，关闭他们的个人电脑，特定的时间期限后或特定日期和时间。
Contains members that get the current date or time, perform date calculations, return a date or time, set the date or time, or time the duration of a process.
包含的成员会取得目前日期或时间、执行日期计算、传回日期或时间、设定日期或时间，或计算处理序持续期间的时间。
Words of time-quantity can be placed before or after a verb but the preverbal ones usually do not express span of duration except in some particular structures.
时量词语可以在动词前或后出现，除了在一些特殊结构外，动词前的时量词语一般不表示持续时段。
How do I time execution duration of a program or script from the command line?
我如何从命令行执行的程序或脚本的时间？
The program of study in Alberta must have been at least one year (i. e. minimum of two semesters of full-time study, or equivalent) in duration.
在阿尔伯塔省完成的学习项目时间至少达一年（相当于两个学期的全日制学习）。
The time duration of at least one or more preceding time periods between individual signal pulses is taken as a measure of the time interval which is currently to be assessed.
在单个信号脉冲之间的至少一个或多个之前的时段的持续时间被作为对于实时待评估的时间间隔的量度。
Gets or sets the maximum duration of time that messages are valid when sent by the service.
获取或设置消息在由服务发送时的最长有效时间。
TTFB (or Time to first byte) is the duration from the initial network request being initiated by the browser to the first byte being received from the server.
是浏览器的初始化到从服务器接收到的第一个字节的时间。
TTFB (or Time To First Byte) is the duration from the initial network request being initiated by the browser to the first byte being received from the server.
从响应的第一个字节开始，到把响应接收完为止的时间。
TTFB (or Time To First Byte) is the duration from the initial network request being initiated by the browser to the first byte being received from the server.
从响应的第一个字节开始，到把响应接收完为止的时间。
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