A user experience designer could help to improve a person's experience with just about anything—a doorknob, a faucet, a shopping cart.

用户体验设计师可以帮助改善人们体验几乎任何事物——一个门把手，一个水龙头，一个购物车。

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We don't even have a faucet or a tap.

我们甚至没有水龙头或自来水。

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"It was literally like someone turned off a faucet," said Ms. Kavanaugh.

“实际上就像是某人关上了一个水龙头”，卡夫劳夫女士说。

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But what you really need is hiring,a faucet. And no one has turned on that faucet yet."

VOA: standard.2009.07.02

Every time you turn a light switch on or a faucet off you interact with the market.

FORBES: Economists Aren't As Clever As They Think They Are

"When I first started telling the truth, it came out like water trickling out of a faucet, " Hamilton said.

WSJ: Hamilton Sees Armstrong's Long Road

In other words, Niagara Falls, if not turned off and on like a faucet, is turned up and down like a fancy massaging showerhead.

NPR: Excerpt: 'Inventing Niagara'