第一句不对，第二句基本正确，第三句是对的。但是这里一般可以省略“个”，用“24小时”。
The third one is correct, but the second one is also ok. "个" in this sentence can be omitted.
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November 9, 2010
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How to pronounce "R" in Spanish or Finnish? I'm trying hard!!
I mean how to trill with the tip of the tongue coz I need some explanation in more detail. Thanks!
