第一根小树枝，亲爱的爸爸，你转身回家时碰到你帽子的树枝。

The first twig, dear father, that brushes against your hat when you turn your face to come homewards.

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第二天，他用来搅拌水和调味剂的小棍被冻了在溶液里面，第一根冰棍就这样诞生了。

The next day, the stick he'd used to stir the water and flavored powder mixture had frozen, creating the first popsicle.

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“我们让孩子做的第一件事就是去买一根长棍面包，”安哈克说，“我们认为保护这些习惯是很重要的。”

"The first thing we ask of a child is to go buy a baguette," Anract said."We think it important to protect these habits."

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Because it came from optics, you know, rays of sunlight and so on And in fact, even when we first started pulling synthetic fiber, the first synthetic fiber cellulose was referred to as ray on, because it looked like a ray that was being pulled.

因为它源自光学，比如太阳光线等等,实际上，及时当我们首先开始抽出,人造纤维，第一根人造纤维的纤维素,叫做光线，因为那条在被抽出的纤维素,看起来像是一道光线。

麻省理工公开课 - 固态化学导论课程节选

That gets us the first one.

这是氮气的第一根键。

麻省理工公开课 - 固态化学导论课程节选