因此，前脑的绝缘化是在青少年晚期和二十岁初期完成的。

So it is with the forebrain's myelination during the late teens and early 20s.

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而如果问题采用轻浮的、“峡谷少女” （指1970年代后期及1980年代初期迁居加利福尼亚圣费尔南多山谷地带的女性青少年, 其特点是富有革新、反抗和自由思考的精神）的口吻，那么学生会在文章中大量使用“like”、“sorta”、“kinda”这种口语化的词汇。

If asked in a flighty, "Valley girl" way, the students punctuated their answers with "like, " "sorta" and "kinda."

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那时，我们还处在太空自动化、太空探索和太空研究时代的初期。

At that time, we were at the beginning of the age of [space] automation, discovery and research.

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