本期内容：

Some of the biggest names in music have joined forces to celebrate healthcare workers in a globally televised concert. Lady Gaga, Paul McCartney and Billie Eilish were among more than 100 artists who performed songs from their living rooms, due to the coronavirus lockdown.
The Rolling Stones even managed to play together from four separate locations.


join forces: 团结起来，团结一致
· air force: 空军
celebrate vt. 颂扬（praise）；庆祝
· We celebrate his heroic actions.
我们赞扬他的英勇行为。
concert n. 音乐会，（现场）演唱会
· live concert: 现场音乐会
lockdown n. 隔离


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