在文字出现之前，就有舞蹈语言了。
Before there was the written word, there was the language of dance.
在真正意义上的机器人出现之前，有许多玩具机器人。
莫尔斯是海象出现之前的另一个名字，且似乎已经传播到其他语言，唯独在英语中却不再使用。
Morse was yet another name that appeared before walrus and seems to have spread to other languages only to drop out of use in English.
在关闭所有程序之前不要关掉电脑，否则可能会出现问题。
Don't turn off the computer before closing all programs or you could have problems.
在合成化学染料出现之前，诸如靛蓝之类的纺织染料主要来源于植物。
Textile dyes, such as indigo, were mostly of plant origin until the advent of synthetic chemical dyes.
英语的拼写一直是个问题，但在字典出现之前，它更是一个问题。
The spelling of English has always been a problem, but it was more of a problem in the days before a dictionary.
在电影诞生之前，他们就已经出现很久了。
雄鹿窝通常出现在秋天落叶之后，也就是发情之前或发情期间。
Buck scrapes are generally created after leaf-fall in autumn, which is just before or during the rut.
这些事情都发生在蒸汽火车出现之前，而且，运河修建在那时正处于繁荣时期。
This was before the steam locomotive, and canal building was at its height.
互联网使新闻更具参与性、社会性和多样性，恢复了大众媒体出现之前那个时代的散漫特征。
The internet is making news more participatory, social and diverse, reviving the discursive characteristics of the era before the mass media.
我们目前所认为的史实，主要都是从考古证据中所得，这些无声的证据出现于文字记录之前，因此就需要繁复的考证及解读。
What we think we know derives chiefly from archeological evidence, which is before writing--mute evidence that has to be interpreted and is very complicated.
主动学习者不断地监测自己的理解，他们知道自己的理解什么时候出现了问题，在迷失方向之前就会寻求帮助。
Active learners are constantly monitoring their understanding, they know when their comprehension breaks down, and they ask for help before they become lost.
在互联网出现之前，从别人那里租冲浪板、电动工具或停车位是可行的，但通常其带来的麻烦多于它应有的好处。
Before the internet, renting a surfboard, a power tool or a parking space from someone else was feasible, but was usually more trouble than it was worth.
马里兰州交美特科技公司的莫斯坎瑞斯，一位专门研究污染的科学家，说：“早在节能技术出现之前，室内环境就已经很脏了。”
"The indoor environment was dirty long before energy conservation came along," says Moschandreas, a pollution scientist at Geomet Technologies in Maryland.
当你忘记如何操作一个熟悉的物品，如微波炉，或是忘记如何开车到一个你之前就拜访过很多次的朋友家时，这可能就是出现问题的征兆。
Forgetting how to operate a familiar object like a microwave oven, or forgetting how to drive to the house of a friend you've visited many times before can also be signs of something going wrong.
水痘患者在出现任何症状之前都可以传播病毒。
A person who has chickenpox can spread the virus even before he or she has any symptoms.
在这个可怕的幽灵出现之前，我在恐惧中退却，这种恐惧在我写作时伴随着我。
Before this awful apparition, I retreat in terror that is upon me as I write.
研究人员发现毒液甚至在蛇出现之前就已经进化出来了，大约在一亿年前。
The researchers found that venom evolved before snakes even existed, about a hundred million years before.
在这种有氧健身运动出现之前，市面上已经有不少健身水疗会所，在大城市甚至有全国性的连锁机构。
A number of fitness spas existed prior to this aerobic fitness movement, even a national chain with spas in most major cities.
早在冰箱出现之前，人们就需要冰来保存和提供食物了。
Well before the arrival of freezers, there was a demand for ice for preserving and catering food.
远在万维网出现之前，理性和启蒙的趋势就已受到了威胁。
The trend toward rationality and enlightenment was endangered long before the advent of the World Wide Web.
在拖拉机出现之前，这是一项重要的业务。当时，许多家庭以务农为生，骡子被用作役畜。
This was an important business before the days of tractors when many families made a living from farming, and mules were used as work animals.
在Mosaic 出现之前，使用万维网的主要是科学家和其他技术人员，他们只是发送和接收文本就很开心了。
Before Mosaic, the web had been used mainly by scientists and other technical people, who were happy just to send and receive text.
在1984年的一本书中，克莱尔·C ·罗伯逊认为，在殖民主义出现之前，在加纳和整个非洲，年龄是地位和权威的一个更重要的指标，而不是性别。
In a 1984 book, Claire C, Robertson argued that, before colonialism, age was a more important indicator of status and authority than gender in Ghana and in Africa generally.
这一因素一定出现在冰川期之前，并有稍微降低地球温度的效果。
This factor must precede an ice age and have the effect of slightly lowering Earth's temperature.
在伊斯兰教出现之前的阿拉伯，被称为“拉维斯”的人常常依附于诗人作为官方记忆者。
In pre-Islamic Arabia, people known as Rawis were often attached to poets as official memorizers.
中世纪时期，现代银行和信用工具出现之前，人们在家里存钱，一次丢几个硬币到罐子或盘子里。
In the Middle Ages, before modern banking and credit instruments, people saved money at home, a few coins at a time dropped into a jar or dish.
他们打哈欠似乎与困倦或者无聊没有任何关系，但恰恰相反，打哈欠这一行为的确出现在了活动水平的变化之前。
Their yawning seems to have nothing to do with sleepiness or boredom—quite the reverse—but it does precede a change in activity level.
研究人员还指出，在我们发现幸福感开始下降之前，在2013年出现最急剧的幸福感下降之前，经济衰退就已经出现了。
The researchers also note that the recession hit some years before we see the beginning of the wellbeing drop, and before the steepest wellbeing decline, which occurred in 2013.
研究人员还指出，在我们发现幸福感开始下降之前，在2013年出现最急剧的幸福感下降之前，经济衰退就已经出现了。
The researchers also note that the recession hit some years before we see the beginning of the wellbeing drop, and before the steepest wellbeing decline, which occurred in 2013.
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