真空的瓶盖总是很难打开，有没有什么窍门可以毫不费力的打开瓶盖呢？在盆晨倒上一些热水，越热越好，最好是开水。感觉能没过瓶盖就够了，下面就我们的妙招了。把瓶盖朝下放进水里，你看，盆里的水刚好没过瓶盖，等半分钟左右，就可以开瓶盖了。用这点时间我跟你说说，这个方法为什么能把瓶盖打开，这是因为物体都有热胀冷缩的特性，金属瓶盖接触到热水，迅速膨胀，虽然玻璃瓶口受热也会膨胀，但它是晚一步的，是隔着瓶盖受热的。再加上它里面的食物是凉的，所以它的膨胀的速度远远赶不上瓶盖。这样它们之间就会产生了缝隙，就能打开了。好了，时间到了，取出来试试，瞧，很轻松就打开了。有了这个方法，以后拧瓶盖就不再费劲了。很热水一泡就行了，很简单吧。用这种方法开瓶盖，你既不需要撬，也不需要烤，不用担心撬坏瓶子弄伤手，也不用担心烤到手，更不用担心瓶子爆裂，很安全！这个方法还有一个好处，不管多大的瓶子，只要头朝下，往热水里一泡，准能轻轻松松地打开。经过实践，这个方法是最好使的，几乎是百分之百能打开。这真是瓶盖开不了，热水泡一泡，立马就见效,开盖变轻巧。本文由www.chinacap.net.cn提供

中译英：

The vacuum bottle is always difficult to open, there is no tricks can easily open the bottle? Pour some hot water in the basin of the morning, the more heat the better, it is best to boiling water. Feeling can not cover enough, here is our strategy. Put the bottle down into the water, you see, the water in the basin was not the lid, and so on for about half a minute, can open the bottle cap. By this time I to tell us your opinion, why this method is able to open the bottle, this is because the object has a characteristic of expansion and contraction, the metal cap into contact with hot water, the rapid expansion, although the glass bottle heating will be expanded, but it is late one step, is heated through the bottle cap. Plus it inside the food is cold, so it expanded faster than the cap. So that they will have a gap, you can open it. Well, time is up, take out to try, look, it is easy to open. With this method, after the screw cap is no longer difficult. A hot water soak on the line, very simple. With this method of opening the bottle cap, you need not to pry, also do not need to cook, don't worry about the broken bottle hands hurt, do not have to worry about roast it, not to worry about the bottle burst, very safe! This method also has a good, no matter how big the bottle, as long as the head down, into the hot water soak, could easily open. Through practice, this is the best way to make, is almost one hundred percent to open. This is really the cap can not open, hot water soak, immediately effective, open cover variable light.