Comma

(noun.) anglewing butterfly with a comma-shaped mark on the underside of each hind wing.

(noun.) a punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence.

校对:奥斯瓦德

• The curved bacilli are called _comma_ _bacilli_, from their resemblance to the punctuation mark of that name. Edward W. Byrn. 十九世纪发明进展.

丹尼斯校对