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。
На фоне начавшегося 28 февраля конфликта США и Израиля с Ираном Тегеран нанес удар беспилотником по британской базе Акротири на Кипре. На фоне эскалации ситуации лидеры Германии, Франции и Великобритании пригрозили Ирану военными мерами в случае, если государство продолжит наносить удары по их союзникам на Ближнем Востоке.
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I have three 27” monitors—two portrait flanking one landscape. I find portrait layout to be more useful for more of what I do. I work in the command line a lot, remotely managing a variety of Cisco, Ruckus, and Juniper network switches. To me, command line, chat, email, and Word and PDF documents all usually work better in portrait. I had a difficult time finding good VESA mounting hardware for the two portrait monitors. I ended up with VideoSecu ML411B mounting brackets, and they work quite well. My partner designed and 3D-printed a great, simple mount for the landscape monitor.