You are not obligated to buy a present in return if you had no intention of doing so.
如果你从没有想过为别人回礼，那么你也没有义务去购买礼物回赠。
Note that I have to check that the attribute is actually present, since when it's absent the contains test would return true (the empty string is contained in all strings).
我必须检查这个属性实际上是否出现，因为当没有这个属性时，contains测试将返回true(所有字符串都包含空字符串)。
Since all the cases are already present in the model, we can return to this view after we finish with the Search Items case and continue to model the next use case.
由于所有的用例都已经显示在模型中，在结束SearchItems用例后我们可以返回到这个视图，并接着为下一个用例建模。
Both of the following commands return the last update of a password change or initial set (if present). In this example, we are interrogating user alpha's last password update.
下面两个命令都返回最近更新或初始设置密码的时间(如果有密码的话)。
The ability to return to concentration and work; the ability to rediscover interest in life, and take pleasure in it, while recognizing that present pleasure is far from past joy.
能够再次集中精神并恢复工作。能够重新发现生活的乐趣——尽管认为其远不如过去快乐，但仍并乐于享受。
Each time we notice that we've left the breath, and we return to it, we're strengthening the muscle of living in the present and noticing, which helps us return to the present when we're biking.
每一次我们注意到呼吸紊乱然后将之调整时，我们便是在强化关注生活、关注现在的力量。
For internal software projects, return is either calculated in terms of the 'Net Present Value' of the project, or in terms of an internal rate of return.
对内部软件项目来说，收益或是以项目的‘净现值’计算，或是以内部收益率计算。
In the case of the internal rate of return calculation, a net present value of zero is assumed, and the internal rate of return needed to produce this is computed.
在对内部收益率的计算中，净现值被设为零，要计算的是使净现值为零的内部收益率。
'You can't call me a hero at present, but I will do my best in return for fans' support.'
现在我还不能被称为英雄，但我会尽全力回报球迷的支持。
In addition, the return clause in this query contains conditional logic to determine if an E-mail element is present in a given customer's record.
此外，这个查询中的return子句包含一个条件逻辑，用于判断给定客户的记录中是否存在e- mail元素。
Nature saw that the possibility of a return out of the darkness and falls in consciousness would present itself in time in earth's future history.
自然界看到战胜黑暗与意识下降而回归的可能性，将在地球未来历史中及时展现。
It suggests that coagulation disturbance (DIC) was present in the patients with AOSC complicated by shock and could return to normal during recovery.
上述结果提示AOSC伴有休克的病人多有凝血障碍(DIC)，随着病情好转，上述结果可恢复正常。
Downloads the image at the given URL if not present in cache or return the cached version otherwise.
如果图片不存在缓存中，就根据给定url下载图片，否则返回缓存中的图片。
This idea is explored in Flashpoint, the event series in the comics that sees Barry return to the present day, after saving his mom, with no powers and no memory of the old timeline.
这个想法将在闪电行动中出现，漫画系列中的巴里在救了母亲之后回到了现代，失去了往日的记忆和能力。
In present phase, the employees think a lot of enterprise pension system and welfare system on labor return.
在现阶段国情下，员工在工作回报方面更多的是看重企业年金制度和福利制度。
At present, the system has been put in use at the return section of the Hankou railway station.
目前该系统已在汉口火车站折返段投入使用。
This paper analyses that fresh air and return air efet IAQ in air-conditioning system at present.
分析了目前空调系统新风和回风对室内空气品质的影响。
In this article, we present a model by contract theory to give a solution to the optimal return policy , which the service providers in advance selling use to realize the maximum of the profit.
本文基于合同理论中的机制设计，分析了提前销售的卖方如何针对具有不同保留价值的的买方，通过设计最优菜单式的返还合同，实现自身收益的最大化。
The present state of return water facilities and its application situation after transformation in Baihualing Concentrator of Jinduicheng Molybdenum Mining Corporation were described briefly.
简要介绍了金堆城钼业公司百花岭选矿厂回水设施的现状及改造后的应用情况。
In this paper, authors analyze the tax and fee system of the urban land's return distribution at present in our country, and give advice of improving against the main problem.
本文重点对我国现行城市土地收益分配中的税费制度进行了分析，并针对问题提出了改进的意见。
The thesis introduces the net present value method and the internal rate of return method which are most commonly used in the long term investment of pump enterprises.
介绍了泵业企业长期投资决策中最常用的净现值法和内部收益率法这两种决策方法。
At present, the GARCH models are the most common use models in analyzing the return volatility of financial markets.
当前，用于研究金融市场收益率波动最为常用的是GARCH族模型。
Shows how to return all the files that are present in two specified folders, and also all the files that are present in one folder but not the other.
演示如何返回位于两个指定文件夹中的所有文件，以及仅位于其中一个文件夹中的所有文件。
The technical problems present in measuring upper and lower limit of hot return sinter level in bin were solved.
该装置解决了高温且物料流速较慢的矿槽料位上、下限检测的技术问题。
Concerning the nature of the rights to claim of interest return, there are four versions in academic circles at present.
有关利益返还请求权的性质，目前学术界有四种说法。
Production photos prove that Bossk was present in Jabba's palace and sail barge during Return of the Jedi, though he is very difficult to spot in the film.
《绝地归来》的制作剧照显示，博斯克也在贾巴的宫殿和风帆游艇里，但在电影里很难发现他。
Embodiments of the present invention generally comprise an RF return plate for use in an apparatus that utilizes RF current.
本发明的实施例一般包括一种用于利用射频电流的设备中的射频回传板。
And find there are no-cost debt and return on equity to present the positive correlation relation in commercial credit and capital liability, etc.
商业信用与固定负债等无成本负债与净资产收益率呈正相关关系，其他成分还是负相关。
And find there are no-cost debt and return on equity to present the positive correlation relation in commercial credit and capital liability, etc.
商业信用与固定负债等无成本负债与净资产收益率呈正相关关系，其他成分还是负相关。
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