So there's obviously some challenges, for if this proposal is easy, it has already been done.
当然，这其中也有很多困难，因为要是这个计划很简单的话，早就已经被实现了。
I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
我不废掉神的恩。义若是借着律法得的，基督就是徒然死了。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
这样就解决了通风问题，因为如果有一列火车开进隧道，它就把新鲜空气随之抽进了隧道。
Most people don't have time (or inclination) to try to figure out what a website is for if it's not immediately apparent to them.
如果不在主页上告诉用户网站是做什么的，大多数人没有时间(或兴趣)尝试自己找出一个网站是做什么的。
And as this special report has argued, it is far from clear what sort of future Arabs would opt for if they had a free choice.
同时正如本期特别报道所指出的那样，阿拉伯人在拥有自由抉择的机会时究竟会选取怎样的未来也远未明晰。
Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall.
所以弟兄们，应当更加殷勤，使你们所蒙的恩召和拣选坚定不移。你们若行这几样，就永不失脚。
I make no judgement of this, for if I would deny your right to your evolution, then I would deny that right for myself and all others.
我不做评判，因为如果我否定了你自我成长的权利，那么我也便否定了自己和所有他人同样的权利。
Some materials, however, are easier to spin in this way than others, for if the molecules do not stick together, the liquid stream will break up.
然而，一些材料比其它材料更容易用这种方式纺成线，因为如果分子不粘在一起，液体流就会断裂。
The implications of this statement are startling, for if we have created the reality of our individual and global lives, then surely we can change what we dont like.
这种观念隐含的意义是惊人的，因为如果我们创造了我们个人和世界的生活现实，那么我们肯定能够改变我们不喜欢的事物。
Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
我若不去，保惠师就不到你们这里来。我若去，就差他来。
woe unto thee, Bethsaida! for if the mighty works had been done in Tyre and Sidon, which have been done in you, they had a great while ago repented, sitting in sackcloth and ashes.
伯赛大阿，你有祸了。因为在你们中间所行的异能，若行在推罗西顿，他们早已披麻蒙灰坐在地上悔改了。
Such fatalism is a deadly adversary, for if we believe that the spread of nuclear weapons is inevitable, then in some way we are admitting to ourselves that the use of nuclear weapons is inevitable.
这种宿命论是我们的致命敌人，因为，如果我们认为核武器扩散是不可避免的，就等于在某种程度上对自己承认核武器的使用是不可避免的。
Our generation's response to this challenge will be judged by history, for if we fail to meet it – boldly, swiftly, and together – we risk consigning future generations to an irreversible catastrophe.
历史将对我们这一代人对这一挑战的反应作出评判，因为如果我们不能应对这一挑战---大胆、迅速和齐心协力地，---我们将冒使自己的后代遭遇不可逆转灾难的风险。
For if a blogging service can have a personality, then Vox has Ms Trott's.
假如说博客服务可以个性化的话，那么Vox恰好就体现了Trott女士的个性。
It is a faithful saying: For if we be dead with him, we shall also live with him.
有可信的话说，我们若与基督同死，也必与他同活。
For if God spared not the natural branches, take heed lest he also spare not thee.
神既不爱惜原来的枝子，也必不爱惜你。
For if you do not take Yizhou, others will-and then it will be too late for regrets.
今若不取，为他人所取，悔之晚矣。
I cast not away the grace of God. For if justice be by the law, then Christ died in vain.
我决不愿使天主的恩宠无效，因为，如果成义是赖着法律，那么，基督就白白地死了。
For if I by grace be a partaker, why am I evil spoken of for that for which I give thanks?
我若谢恩而吃，为什么因我谢恩的物被人毁谤呢。
For if they which are of the law be heirs, faith is made void, and the promise made of none effect.
若是属乎律法的人，才得为后嗣，信就归于虚空，应许也就废弃了。
For if that first covenant had been flawless there would have been no need to look for a second one.
那前约若没有瑕疵,就无处寻求后约了
For if the inheritance be of the law, it is no more of promise: but God gave it to Abraham by promise.
因为承受产业，若本乎律法，就不本乎应许。但神是凭着应许，把产业赐给亚伯拉罕。
For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass.
因为听道而不行道的，就像人对着镜子看自己本来的面目。
For if any of these propositions is a familiar fact, there is no need even to mention it; the hearer adds it himself.
因为如果这些命题中有为人熟知的事实，则其甚至无须提及，听者会自己加上的。
For if you saw your transient, earthly life set in dimensions of eternity, there wouldn't be any virtue in endurance.
因为如果以永恒的维度为背景，你看到必然只是自己短暂如瞬的尘世生涯，那么坚忍不懈就无法成为什么美德了。
For if nostalgia is the mark of the human, perhaps no one has given such flesh and volume to these phantoms of regret.
因为，如果对往日的留恋之思是人类的印记，那么或许无人给过这些悔恨的幻影以血肉之身。
For if nostalgia is the mark of the human, perhaps no one has given such flesh and volume to these phantoms of regret.
因为，如果对往日的留恋之思是人类的印记，那么或许无人给过这些悔恨的幻影以血肉之身。
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