Commenting on the find , snake expert Robert Henderson from the Museum of Natural History , said: “Worldwide new species of frogs are being discovered and described quite regularity.
请问老师,这个句子里said前面为什么要加逗号? 去掉可以吗?不明白这个逗号在这里的用法,或者说,这个句子成分的顺序还可以写成什么样,谢谢老师