Starting at the top of Listing 3, policies are valid for a set period of time.
首先从清单3的顶部开始，策略在一个固定时间段内有效。
The validity period is indispensable to a firm offer, that remains valid until a stipulated time or until it is accepted or rejected.
有效期对于确盘是必不可少的，在规定的时间之前或在被对方接受或拒绝之前确盘一直是有效的。
The quote should not be binding and only be valid for a short period of time.
报价不应该是固定的，应该只在短期内有效。
Creating a public URL is a handy feature exposed by S3; in fact, with S3, you can create a public URL that is only valid for a period of time (for instance, 24 hours).
创建一个公共url是S3提供的一个便捷功能；实际上，使用S3，您可以创建一个公共url，但只在一段时间内有效(例如，24小时内)。
A table that includes temporal data has a pair of date-time columns that indicate the period (the time interval) when the row is valid.
包含时态数据的表有两个日期-时间列，它们表明每一行有效的期限(时间间隔)。
Quite often, published content is only intended to be valid within a specific period of time.
通常，发布的内容只想在特定时期内有效。
Copyright has a set period of time for which it is valid and, unless you take some kind of action, you do not give up those rights.
在有效期内，版权都是生效的。除非你主动放弃。
The response to the above request (shown below) contains the authentication assertion with an attribute/condition that specifies the time period when the authentication is valid.
对上述请求的响应（如下所示）包含带有指定认证有效的时间段的属性／条件的认证断言。
A ticket valid for a specified period of time, as for a series of performances or for transportation between designated points.
在某一规定时期内有效的票证，如对一系列演出或指明地点之间的交通均有效的票证。
Methods the 5 cases with enhanced CT images were measured at each slice, then the Hu of aim position was obtained and the Hu time curve was got. At last, the valid enhanced period would be found.
方法对5例肝门动态扫描ct增强图像有关靶部位的CT值逐层测量，从而得到相应的“CT值时间曲线”，最终找出有效增强周期。
If the letter of credit had been valid for a longer period, we should have had time to make the matter thoroughly clear.
如果信用证有效期较长的话，我们就会有时间把事情彻底弄清楚。
Designated Credit Card accounts should remain valid and in good financial standing during the promotion Period and at the time of rewards fulfilment in order to be eligible for this promotion.
指定信用卡户口必须于推广期内至获取奖赏时仍为有效及信用状况良好，方可享有此推广优惠。
The former correct for the varying time-delays by using an approximation of the binary orbit which is valid only if the observation time is much less than the orbital period of the binary system.
前一种通过近似的双星轨道对时间延迟进行修正，只在观测时间远小于双星系统的轨道周期时才有效。
Client's order shall be valid in accordance with the type and time of the given order, as specified if the time of validity of the order is not specified, it shall be valid for an indefinite period.
客户的订单应根据相应的类型和时间生效，如指定订单没有指定的有效时间，它无限期地有效。
Please note: Cards are activated the first time they are used at an attraction and are valid for the number of calendar days you have purchased out of a 14 day period after activation.
第一次使用此卡购票后卡片开始激活生效。 除1日卡的有效期为1天之外，其他天数的卡片的有效期为14天，在14天中按照您选择的天数使用。
Please note: Cards are activated the first time they are used at an attraction and are valid for the number of calendar days you have purchased out of a 14 day period after activation.
第一次使用此卡购票后卡片开始激活生效。 除1日卡的有效期为1天之外，其他天数的卡片的有效期为14天，在14天中按照您选择的天数使用。
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