慢速英语:Where Are the Tallest Buildings in the World?

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短语讲解：

1.With better technology, architects — people who design buildings — engineers and builders have been able to build buildings higher and higher.

be able to 能够; 能，会
例句：They may be able to help with childcare so that you can have a break
他们可以帮忙照料孩子，这样你就可以歇一歇了。

2.“The Jin Mao tower the oldest of the three has just recently opened up an experience where basically you can be tied to the side of the building and lean over the edge outdoor and sort of (laugh) test your fortitude.”

open up 打开; 开发
例句：They decided to open up an office in town.
他们决定在市区设立一个办事处。