The Pierre Boulez Saal, a hall in Berlin, invites parents to morning chamber-music concerts—baby, not jacket, required.

柏林的 Pierre Boulez Saal 音乐厅邀请家长们参加早间室内乐音乐会——需要的是宝贝，而不是夹克。

" These things seem to be so common that it is practically impossible to avoid coming into contact with them, " says Frederick vom Saal, a biologist at the University of Missouri.

密苏里大学生物学家 Frederick vom Saal 说：“这些东西似乎很常见，几乎不可能避免与它们接触。”