There are some big clumps o' columbine in th' garden.
花园里有几大丛漏斗花。
He's gone all th' way to Scotland for th' sports some years.
有几年，他走了很远的路到苏格兰参加运动会。
The use of -o and some test data are helpful in building regexps, because you might have assumed that the regexp worked as lines containing "th" were matched.
通过使用- o和一些测试数据，可以帮助进行regexp的构建，因为您可能会假定此regexp会像匹配包含“th”的行一样工作。
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