求翻译：上周，芝加哥成为美国的第一个城市，加入“淘汰计划的灯”的人们关掉灯，在城市的tallcst建筑，使成千上万的鸟类可以得到在秋冬季homes.Every今年，一些鸟类超过Chicaga飞往南部的道路上，明年春天回来。是什么意思？

Last week, Chicago became the first U.S. city to add "lights-out plan," people turn off the lights in the city tallcst building tens of thousands of birds can be in the autumn and winter homes.Every this year, some birds class fly over Chicaga on the road south, back to spring next year.

Last week the United States, Chicago became the first city plan, adding "out of the lamp" is turned off, the city of lights tallcst building, 1000, 60% to 10,000 birds in autumn and winter homes can get Every . This year, some birds fly over Chicaga southern roads to come back next spring.

Last week, Chicago became US's first city, joined “the elimination plan lamp” the people switched off the lamp, in the city tallcst construction, enabled the tens of thousands of birds to be possible to obtain in fall winter homes. South Every this year, some birds surpass Chicaga to fly to on the p

Week Chicago United States first city, adding "out plans of light" people off of lights, tallcst buildings in city and enables thousands of birds get at autumn and winter homes. Every year, some birds more than Chicaga flew to the South on the road, come back next spring.

Last week, Chicago became the United States the first cities, adding "out plans of light" people to turn off the lights, tallcst building in the city, tens of thousands of birds can be in the autumn and winter homes. Every year, some birds more than Chicaga flew to the South on the road, come back n