[0022] 轨道组件16 包括捕捉组件(catch assembly)，捕捉组件通常以22 表示，并相对 于第二导轨20 中的一个安装。
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Nationally about a million children and teenagers who have not had either one or two doses of the MMR vaccine will be offered catch-up vaccinations, which the London Assembly said it welcomed.
BBC: Cases of measles in London up on 2012 figures
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