Contact your doctor if the cough persists.
如果持续咳嗽，就与医生联系。
We will contact you again if the need arises.
如果有必要，我们会再次和你联系。
If the job's that good, you'll have stacks of money.
如果那份工作真那么好，你就会有成堆的钱。
If the muscle is stretched again it could even tear.
这块肌肉再受到拉伸的话，它甚至可能会拉伤。
If the car needs cleaning, what are you waiting for?
如果这辆汽车需要清洗，你还在等什么呢？
They threatened to sue if the work was not completed.
他们威胁说，如果不完成工作，就要提起诉讼。
Only time will tell if the treatment has been successful.
只有时间才能证明这种疗法是否成功。
If the firm cannot sell its products, it will go bankrupt.
如果这家公司无法销售其产品，它将面临破产。
The bill might have gone through if the economy was growing.
如果经济保持增长的话，那个议案或许已经获得通过了。
I checked to see if the needle indicating volume was oscillating.
我查看了那根音量指针是否在摆动。
火车要是晚点会怎么样呢？
What if the parachute doesn't open?
降落伞打不开怎么办？
See if the results are on teletext.
看看结果是否上了图文电视。
If the dough is sticky, add more flour.
如果面团很粘，就再加些面粉。
But what if the government takes no heed?
但要是政府不理会该怎么办呢？
Ask for a refund if the goods are faulty.
商品如有缺陷，可要求退款。
I don't know if the painting is authentic.
我不知道这幅画是不是真迹。
If the pain continues, consult your doctor.
如果疼痛持续不消退，要请医生诊治。
Please notify us if the above is not correct.
如果上面所说的不正确，请通知我们。
If the explanation is right, two things follow.
如果该解释正确，那么就有两种情形。
Files can be lost if the system suddenly crashes.
要是计算机系统突然崩溃，文件就可能丢失。
It looks as if the blaze was started deliberately.
看来那场火是有人故意放的。
Our only complaint would be if the cheque bounced.
如果支票被拒收，这会是我们惟一的抱怨。
If the pipe bursts it could flood the whole house.
要是水管破裂整座房子就会灌满水。
A full refund will be given if the item is faulty.
如货有瑕疵将退回全部货款。
If the wrong password is given the program aborts.
如果键入错误的密码，程序即中止。
If the answer is "yes," then we need to leave now.
如果答案为“是”，那么我们现在就该离开了。
The mayor will resign if the vote goes against him.
如果投票结果对市长不利，他将辞职。
The effect will be ruined if the paint is too thick.
涂料太稠就会破坏效果。
If the weather's fine, we'll go hiking this weekend.
如果天气好，我们这个周末就去远足。
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