By default a variable "miss" returns an empty string.

默认的一个变量找不到时将返回一个空字符串。

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Walcott returns but Koscielny out injured By Chris HarrisTheo Walcott is back in the Arsenal squad for Saturday's game against Birmingham - but Laurent Koscielny will miss out.

沃尔科特复出进入周六对阵伯明翰的阿森纳阵容名单，但科斯切尔尼将缺阵。

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His plan to improve: take a seven-week break from tournaments, a stretch of almost two months that will see him miss Miami and Monte Carlo before he returns to action in Madrid in May.

WSJ: Paths Differ but Goals Same for Nadal, Federer