芭蕾靴最早流行于20世纪80年代，现在在全世界通过定做店和网店都能买到。
The Ballet Boot originally gained popularity in the 1980's, and is now available worldwide through specialty stores and online.
由于他们经常是奶牛场里起得最早的两个人——可能从来就不是偶然——因此他们觉得自己就是全世界起得最早的两个人。
Being so often - possibly not always by chance - the first two persons to get up at the dairy-house, they seemed to themselves the first persons up of all the world.
首先我们需要了解的是全世界的宝宝用极其类似的方式开始自己的语言之旅，这也是科学家们的最早发现。
The first thing to know about babble is also the first thing scientists noticed: babies all over the world babble in similar ways.
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