from :
http://www.oxfordlearnersdictionaries.com/definition/english/jigsaw?q=jigsaw
OAKD: jigsaw
(also jigsaw puzzle) (also puzzle especially in North American English)
a picture printed on cardboard or wood, that has been cut up into a lot of
small pieces of different shapes that you have to fit together again
请问非限定用法中的that子句前面不是不能加上逗号的吗?
那为何英文解释中的that子句 前面有加上逗号?
谢谢

that...像是插入句补充说明前述，that指的是picture

辞典里这种用法超多的，我也好奇为什么可以加逗点？

http://alt-usage-english.org/excerpts/fxthatvs.htmlhttp://www.ldoceonline.com/dictionary/jigsawhttp://www.dictionary.com/browse/jigsaw-puzzle上述两字典就没逗点囉，参考一下

全句太长或许可斟酌加一下以调整节奏

朗文字典解释中的that是关代当fit受词，跟牛津字典解释中第二个that是一样的用法，无法对比