考量指思考衡量，本意是对一件事情反复斟酌，反复的推敲不断的考虑，一般用于书面语，口语中也经常用到。也指对事态的进展，进行深入的思考和判断。
I have a NSMutableArray which contains a few NSString objects. How can I test if the array contains a particular string literal?
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