The main umbrella has trap door on the top, the secondary umbrella covers the trap door, and the spring presses the secondary umbrella.

主伞的顶部开有“天窗”，“天窗”的上端罩有副伞，副伞的上端压有弹簧。

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Even less funding is available for mental health promotion, an umbrella term that covers a variety of strategies, all aimed at having a positive effect on mental health well-being in general.

可用于促进精神卫生的资金甚至更少。 促进精神卫生是一种总括的说法，其中涵盖各种各样的战略，目的都是要对精神卫生产生积极影响。

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Accessibility is an umbrella term that covers everything and everyone involved in making a product usable by people with different abilities.

易访问性是一个总括的术语，它包括生成使具有各种残疾的人易用的产品所涉及的所有东西和人。

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Even if deposed as head of Hamas's politburo, he may fancy replacing Mr Abbas as head of the Palestine Liberation Organisation, the umbrella that covers all Palestinian outfits, though it has hitherto excluded Hamas.

ECONOMIST: Israel and Palestine

Arrhythmia is an umbrella term which covers various conditions.

BBC: Electrode vest gives hope to heart rhythm patients