wallflowers
n.
桂足香，桂香香水，局外人( wallflower的名词复数 );
例句:
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Tubs planted with wallflowers brightened the area outside the door.
桂竹香盆栽为门外的景致增色不少。
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The flurry of deals is likely to prompt more linkups as industry wallflowers try to avoid being sidelined.
来自WSJ
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In the end, it was music that brought everybody together, including Bruce Springsteen and the Wallflowers.
来自CNN