气相色谱分析中是否一定要用质谱检测器？
Do we always need mass spectrometry with gas chromatography?
经济的飞速发展是否一定要以牺牲环境为代价？
The rapid development of economy is it really necessary to the expense of the environment?
延期付款的信用证，开证行是否一定要作出承兑或者告知到期日呢？
Under deferred credit terms, no draft will be presented, so the issuing need not to accept it, but the issuing bank has responsibility to advise maturity date.
将来的某个时候，你也许会问你为什么要跑步，想知道你是否一定要继续跑步。
At some point, you may question why you run and wonder if you should continue to get out there.
想要吸引漂亮的女生进入你的生命是否就意味着你一定要具备所有这些东西呢？
Does it mean that you have to be all these things in order to attract beautiful women into your life?
在你扔掉任何东西之前，一定要考虑它是否可以被再次使用。
Before you throw away anything, always think whether it can be reused or not.
无论我的品格是否有问题，有一点是肯定的：我的名声有问题了，白宫早在六个多月前就已经向我承诺过了——一定要毁了我的名声。
Whether I had a character problem or not, I sure had a reputation problem, one I had been promised by the White House more than six months earlier.
如果您选择在自己的系统中使用该代码，一定要检查是否会返回位置并且如果未对某个位置进行解析时为用户呈现一条告知性的错误消息。
If you choose to use this code in your own system be sure to check if a location is returned and present an informative error message to the user if a location isn't resolved.
因此，在决定是否删除当前未使用的索引时，一定要仔细考虑。
So be cautious when deciding whether or not to drop an index that appears not to be used.
如果遇到这样的消息，一定要确认连接到数据库的用户或应用程序是否提供了合法的用户ID和口令。
If you ever encounter these messages, ensure that the user or application connecting to the database has provided a valid user id and password.
但是我们一定要在这几天内确定是否能获得货源。
消息最终会投递，但是一定要考虑您的应用程序是否在意消息的次序。
The message will eventually be delivered, but this is an important consideration if your application cares about the order of the messages.
与前面一样，一定要检查原来的和复制的文件系统的总大小和文件数量是否匹配。
As before, be sure to check the original and copied filesystem on the total size and the number of files match up.
让他们明白你一定要去——不论当你休假回来时是否还有这个职位在等着你。
Make it clear that you're going to go regardless of whether there's a job waiting when you get back.
我们在买贵重的东西时一定要小心，问问自己买这样的东西是否明智。
We should be very cautious when buying expensive things and ask ourselves if we are making a wise purchase.
同样需要提醒您，一定要确认您是否选择了所有必需的成员。
The same warning about making sure that you select all required members applies.
你是否被驱迫着去赢取，但却推向先生“我一定要舒适自在”以求得安逸无事？
Are you driven to win, but pushing Mr. "I must be comfortable" to score the touchdown?
如果遇到类似的消息，一定要确认连接到数据库所提供的用户ID是否具有执行目标操作的适当权限。
If you ever encounter similar types of messages, ensure that the user id provided to connect to the database has the appropriate privileges to perform the target operation.
一定要确保你的文案开头是否能够有效地介绍你的特点。
Ensure that the beginning of your bio provides an effective summary of your sound.
另外，在使用之前，一定要检查驱动程序是否适用于您的处理器。
Also, be sure to check that the driver will work with your processor before trying to use it.
一定要记住：你不仅仅要了解是否有很多人用这个词搜索，你还要了解关于这个词有多少站在竞争排名。
Keep in mind that you're not only checking to see if enough people are searching for a particular word, you're also trying to determine how competitive that phrase is in terms of rankings.
如果您发现管理服务器上的邮件功能不工作，一定要检查sendmail守护进程是否在运行；如果没有运行，手动启动它。
If you find that the mail functionality is not working on the management server, be sure to check to see if the sendmail daemon is running; if not, manually start sendmail.
面试官只有30分钟时间来决定你是否合适这份工作，所以面试期间你一定要强调自己的核心竞争力、以及过去的相关成就。
The interviewer has only around thirty minutes to decide if you are the person for the job. In this time you need to stress your key strengths and relevant past achievements.
如果他问你是否独自一人，能否送你回家的时候，一定要拒绝他。
If he asks if you're all alone, can he take you home, you must tell him no.
如果他问你是否独自一人，能否送你回家的时候，一定要拒绝他。
If he asks if you're all alone, can he take you home, you must tell him no.
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