But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

Well, but it ought so in the midst that the bullion, was at the end of the bullion conversation that went on forth actual three and a half hours, and you saw the shortened version.

在他黄金事业中间应该有的挫折，一般都在事业的最后出现,总时长三个半小时，你们看了缩短版。

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And if you are prepared to stand up for about two and a half to three hours to watch a play,

而且你要准备好了站上大约两个半小时到三个小时，去看一场戏剧，

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