15. The adolescent wants to do things first for only then does he appreciate the problems involved and want to learn more about them.
青少年想先做一些事情,只有这样他才会意识到其中的问题,并想要了解更多。
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16. In the 1950s, data on captive chimpanzees collected by James Gavan appeared devoid of evidence of an adolescent growth spurt in these apes.
在20世纪50年代,詹姆斯·加万收集的关于圈养黑猩猩的数据似乎缺乏这些类人猿出现青春期激增的证据。
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17. They do these things better in primitive life, for there the adolescent boy joins his father in making canoes and going out fishing or hunting.
在原始生活中,他们能够把这些事情做得更好,青春期的男孩和父亲一起做独木舟,出去钓鱼或打猎。
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18. Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal.
曾经主要由青少年购买的口香糖,现在在广告中被用作饭后的口气清新剂和牙齿清洁剂。
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19. The researchers conclude that electronic communication was the only adolescent activity that increased at the same time psychological wellbeing declined.
研究人员得出结论,电子交流是青少年唯一一项在心理健康下降的同时增加的活动。
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20. Another study of high school social networks found less bullying and aggression the higher the density of mixed-sex friendships within a given adolescent network.
另一项关于高中社交网络的研究发现,在特定的青少年网络中,异性友谊密度越高,欺凌和攻击行为就越少。
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21. While most parents, teachers and clinicians would react to an adolescent using drugs or getting drunk, they may easily overlook teenagers who are engaging in inconspicuous behaviors.