This method tells you all information you need to know: whether one node is descendant of an ancestor of the other, whether it is before or after, and so on.
这个方法告诉您所有想知道的信息：一个节点是否是另一个节点的祖先的后代，它是在前面还是后面呢，等等。
When you create a variable, you need to declare what type it is before you can use it.
在创建变量时，需要声明变量的类型，然后才能使用该变量。
Listen I misplaced the 240 million dollar lottery ticket.You have to tell me where it is before my wife comes home, I asked.
听着，我不知把那张中了两亿四千万的彩票放哪了，你要在我妻子回到家前告诉我它在哪里。
If you read a number from a file and expect it to be positive, check that it is before further processing with that number.
如果从文件中读入一个数字并期望其为正数，那么，在使用其进行进一步处理前对其先验证一下。
Listen I misplaced the 240 million dollar lottery ticket. You have to tell me where it is before my wife comes home, I asked.
听着，我不知把那张中了两亿四千万的彩票放哪了，你要在我妻子回到家前告诉我它在哪里。
This method tells you all you need to know: whether one node is a descendent or an ancestor of the other, whether it is before or after, and so on.
这个方法告诉您所有想知道的内容：一个节点是另一个节点的后代还是祖先、在前面还是后面等等。
It is important to recognize jealousy and to nip it in the bud before it gets out of hand.
意识到嫉妒并在它发展到无法控制之前就把它消灭于萌芽状态，这一点至关重要。
There should be greater treatment of sewage before it is discharged.
污水排放前应该进行更充分的处理。
It is conceivable that before going hunting the hunters would draw or study pictures of animals and imagine a successful hunt.
可以想象，在狩猎之前，猎人会画出或研究动物的图片，并想象一次成功的狩猎。
Resisting automation is futile: it is as inevitable as industrialization was before it.
抵制自动化是徒劳的：它就像之前的工业化一样不可避免。
It would be better if there were some way to see atmospheric water while it is still vaporing before raindrops form.
如果我们能找到一些能在雨滴形成以前的蒸汽状态下就观察到大气水方法，情况会变的好一些。
But soon Smith is reporting even before it happens—and it's all terrible—one disaster after another.
但很快，史密斯甚至在事情发生之前就开始报道了，这是一场又一场可怕的灾难。
Firstly, food is often thrown away before it reaches customers because too much of it is produced.
首先，食物经常在到达顾客之前就被扔掉，因为生产的食物太多了。
It is significant that he changed his will only days before his death.
他在临终前几天修改遗嘱，这很能说明问题。
An aeroplane has to reach a certain speed before there is enough lift to get it off the ground.
飞机得在达到一定的速度以后，才能有足够的提升力从地面起飞。
Even if the recovery is under way, it may be some time before the official number crunchers confirm it.
即便经济已经开始复苏，仍要过一段时间官方统计数字才能确认这一点。
It is advised that fans seeking autographs join the line before practice starts.
建议寻求亲笔签名的影迷们在活动开始前排好队。
It is necessary to adjust our mood before exams because we may not do well as usual under stress.
在考试前调整心情很有必要，因为面对压力的时候我们可能无法像往常一样做的好。
It is clear now that it is a matter of time before the entire European coastline disappears under water.
现在很显然，整个欧洲海岸线消失在水下只是时间问题。
My room is a mess, but I needn't clean it before I go out tonight.
我的房间很乱，但我今晚出门之前不必打扫。
The real GDP is almost always higher than ever before; it falls only during recessions.
实际GDP几乎总是高于以往任何时候；它只在经济衰退期间下降。
This self-handicapping, it is important to take this into account before just deciding to go with that first explanation.
这种自我设限很重要，在决定采用第一个解释之前，必须要考虑到这一点。
Business along this historic trading road is still going on though it is not as busy as before.
这条历史悠久的贸易大道上的生意虽然不像以前那么繁忙了，但仍然在进行。
For Joseph, a colleague at Chloe's office, it is Bach playing on the stereo before the screech of brakes and the crunch of metal.
对克洛伊办公室的同事约瑟夫来说，音响里播放的是巴赫的音乐，然后是刺耳的刹车声和金属的嘎吱声。
Upon reflection, however, it is equally easy to feel like you have seen it all before.
然而，仔细一想，你也很容易觉得你之前已经看过了。
Involuntary part-time employment is still far higher than before the recession, but it is down by 640,000 (7.9 percent) from its year-ago level.
非自愿兼职的员工人数仍远高于经济衰退前的人数，但较上年同期减少了64万人，下降了7.9%。
Milk is sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening.
牛奶不含糖和添加剂，因此营养学家推荐脱脂牛奶作为睡前的最佳选择，因为它最不容易让人发胖。
Scientists say it may be five years before it is possible to test this medicine on human patients.
科学家们表示，在病人身上检测这种药物可能还需要5年时间。
Rogers found that a chick's lateralisation depends on whether it is exposed to light before hatching from its egg—if it is kept in the dark during this period, neither hemisphere becomes dominant.
罗杰斯发现，小鸡的偏侧性取决于它在孵出蛋之前是否暴露在阳光下——如果在这段时间里保持黑暗，右脑或左脑都不会占优势。
A dog's eating habit requires regular training before it is properly established.
狗的饮食习惯需要定期的训练才能建立起来。
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