Test to see if the finish is tacky, and if it is, leave it to harden.

测试一下看看最后一道漆是否还发黏，如果是的话，那就放着让它变硬。

《柯林斯英汉双解大词典》

The empty shell of a snail or clam may be left behind, and if it is sufficiently durable and resistant to dissolution, it may remain basically unchanged for a long period of time.

蜗牛或蛤蜊的空壳可能会被留下来，如果足够持久和抗溶解，它可能会在很长一段时间内基本保持不变。

youdao

Because most of the planet's glaciers are in the northern hemisphere, and if it gets too warm, then glaciers will stop forming.

因为地球上大部分的冰川都在北半球，如果温度过高，冰川就会停止形成。

youdao

And if it pays too little, banks could still fail.

VOA: special.2009.01.30

So there was a good question in Wednesday's class about the de Broglie wavelength and if it can actually go to infinity.

在周三的课上有个关于德布罗意波波长的问题,非常好，就是它能不能到无穷大。

麻省理工公开课 - 化学原理课程节选

If you're having breakfast and it's delicious but it would be perfect if you had it with tea.

假设你在吃早饭，你觉得很美味，如果有杯茶的话，那就完美了。

I want to 课堂 - SpeakingMax英语口语达人

And if it leads to a few extra fans in the seats, the Mets won't complain.

WSJ: No Juice In Big Apple Rivalry

And it's sweet and if it's made correctly, it's very high in fat content.

NPR: The LeeVees, Rocking Hanukkah

If the message is important it will be resent, and if it isn't, who cares anyway?

WSJ: David Gelernter: The Pros and Cons of Cyber-English