A purchaser could even be required to agree to return the piece if it should become needed for scientific purposes.
如果出于科学目的需要该作品，买家甚至可能被要求归还作品。
If it should be necessary, I could come at six.
如果有必要，我可以在六点钟来。
If it should be necessary, I would come at six.
要是有必要，我会在六点钟来的。
If it should be fine tomorrow, we would go on with our climbing.
如果明天天气好，我们可以继续登山。
Should it be necessary (if it should be necessary )I would go there.
如果有必要的话，我就去那里。
Once a candidate service is selected, then the next step is to decide if it should be exposed.
选择了候选服务之后，下一步是决定是否应该公开它。
At the same moment, the share-ownership school also has some problems, such as if it should be profit, the way of returning the share-holders, internal governance structure, etc.
但是股份制学校也出现了许多问题，比如对于学校是否营利，股东回报方式，内部治理结构等方面存在的问题。
If you can buy only one case at auction, it should be vintage port.
如果你在拍卖会上只能买一箱酒，那就应该是优质的波尔图葡萄酒。
If you enrol at a gym that's miles away, you won't be visiting it as often as you should.
如果你加入的健身房离这儿很远的话，你就不会像应该地那样经常去了。
If the district finds homework to be unimportant to its students' academic achievement, it should move to reduce or eliminate the assignments, not make them count for almost nothing.
如果该学区发现家庭作业对于孩子的学业是不重要的，它就应该减少或者免除家庭作业，而不是让它们几乎一文不值。
If it is true, the mantle rocks of the Moon and the Earth should be the same geochemically.
如果这是真的，月球和地球的地幔岩石从地球化学上来看应该是相同的。
If a product is harmful to people's health, it should be withdrawn from sale immediately.
如果一个产品对人们的健康有害，应当立即停止销售这一产品。
If you have a certain skill you should be able to share it with someone.
只要你有某种特定的技能，就应当能够与他人分享。
If people like Kennedy are willing to keep it short to maximize their effectiveness as speakers, we should be smart enough to do the same thing.
如果像肯尼迪这样的人愿意保持演讲的简短以最大化他们作为演讲者的效力，我们也应该足够聪明做同样的事情。
Could you tell me if I should bring the matter up with her, or if it would be better for me to keep quiet?
你能告诉我，我是否应该把这件事告诉她，还是我最好保持沉默？
If the bar exam is truly a stern enough test for a would-be lawyer, those who can sit it earlier should be allowed to do so.
如果律师资格考试对一个想成为律师的人来说是一场足够严格的考试，那么应该允许那些能提前参加考试的人提前参加。
If it's illegal for someone under 21 to drink, it should be illegal for them to drink and drive. That's a no-brainer.
如果不满21岁喝酒是违法的，那他们酒后驾车也应是违法的。这太容易理解了。
If the filter has been saturated with motor oil, it should be discarded and replaced.
如果过滤器已被机油浸透，就应该丢掉并更换一个。
If your retirement plan includes both taxable and tax-deferred accounts, it is worth considering which funds should be placed in each.
假如你的退休计划中同时包含了应纳税和延迟纳税账户，那就要考虑一下应该如何分配资金了。
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