慢速英语:Great Smoky Mountains: America's Most Popular National Park

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短语讲解：

1. The area is known for its wildflowers, autumn colors, waterfalls, and black bears.

be known for 因…而众所周知
例句：London used to be a city known for its "black fogs."
伦敦的“黑雾”一向闻名。

2. It looks like smoke, and gave the area its name.

look like 看起来与（某人或某物）相像[相似]
例句：He doesn't look like a dead fox.
他不象一只死狐狸。

3. But, the official dedication did not take place until 1940, when President Franklin Roosevelt spoke at a ceremony within the national park.

take place 发生，举行
例句：His graduation will never take place if he doesn't get to work.
如果他不下功夫，就永远不会毕业。

4. So, you might share the trail with a hiker in the middle of a months-long hike from Georgia all the way north to Maine.

in the middle of 在…的中间
例句：I was in the middle of the back row.
我在后排的中间。

5. Today, the blue-gray "smoke" that surrounds the mountains is no longer pure.

no longer 不再，已不
例句：He could no longer hold back his tears.
他再也忍不住自己的眼泪。