在医学上，青春期并不是一个模糊的概念。自20世纪中期以来，儿科和内分泌学界主要通过几类指标来判断青春期的启动时间：女孩乳房发育的起始（thelarche）、阴毛出现，以及第一次月经（初潮，menarche）。这些体征被系统地纳入性成熟评定分期体系（ Tanner ），并长期作为国际通用的临床评估工具。
Мерц резко сменил риторику во время встречи в Китае09:25
，这一点在PDF资料中也有详细论述
FT Professional
The most intense rug test I gave the UV Reveal involved a heinous concoction on my fluffiest rug: Way more spilled quinoa than would ever be realistic on a fur rug, spilled catnip, and probably 10 tufts of lint and fur pulled directly from the ChomChom and strewn around the rug's fibers. The UV Reveal actually had the easiest time with the catnip flakes and cat hair puffs, snatching up virtually all traces of either. More quinoa was left behind in the rug and around the edges where the rug hits the hardwood (though most robot vacuums struggle with that). The same thing happened with shredded cheese around the kitchen rug.