walk-up

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On April 13, 1964, nearly an adolescent and watching television from the linoleum floor of her mother's walk-up flat in something deep inside of her.
在1964年4月13日，她已成长为一个青少年，在她母亲那间无电梯的公寓的油布地毯上，电视里的一些东西深深地触动了她。
On April 13, 1964, nearly an adolescent and watching television from the linoleum floor of her mother’s walk-up flat in something deep inside of her.
在1964年4月13日，她已成长为一个青少年，在她母亲那间无电梯的公寓的油布地毯上，电视里的一些东西深深地了触动了她。
But any interruption, whether it's an e-mail, a phone call, or a walk-up, will break this flow and it takes time (15 minutes on average based on the statistics) to get back into the flow again.
而任何的打扰，不管是一封Email，一个电话，或者是一次起身走动，都会打破这个流，并且需要时间（根据统计平均需要15分钟）来重新回到流中。

"My brother and I were talking about how - normally you do not just walk up to a temple or a synagogue and say, 'hey,can I come in and take a look?' So this is a great opportunity and exposes me to a lot of things that I would not otherwise have been exposed to,"
So, Descartes would walk around the French Royal Gardens and the French Royal Gardens were set up like a seventeenth-century Disneyland.
笛卡尔曾经在法国皇家园林中散步,当时的法国皇家园林被建造得,犹如17世纪的迪斯尼乐园一般
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To increase traffic he cut unrestricted walk-up fares by 40% in January out of United's two busiest hubs, Denver and Chicago O'Hare.
FORBES: Deathwatch
Born in New York City 48 years ago, he was adopted by relatives who raised him in their walk-up flat on Chicago's tough South Side.
FORBES: Larry Ellison

a building with several floors and no elevator (= a device for going from one floor to another) or an apartment or office in such a building

A walk-up is a tall apartment building that has no lift. You can also refer to an apartment in such a building as a walk-up.