The water pump USES centrifugal force to send fluid to the outside while it spins, causing fluid to be drawn from the center continuously.

当水泵转动时，其离心力把液体甩出来，从而就不断地从中心吸水。

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Honduras could barely get into Spain's half let alone create a chance of their own, though on one occasion David Suazo did send a left-foot shot wide from outside the box - but that was as close as Iker Casillas came to being put under pressure on a comfortable night for the Spanish goalkeeper.

BBC: Spain 2-0 Honduras

If they are problems, then send the smokers outside to a spot far away from where the patients come in and out, or have them wash their hands and faces, which everyone ought be doing anyway, and only give them the same breaks from work that everyone else gets.

CNN: Barring smokers from hospital jobs unfair

Many Twitter users rely on software from outside companies to search, sort, and send messages through the service.

FORBES: Twitter's Homepage Gets Newsier, Searchier