Since the erg, as I have said, is an inconveniently small unit the amount of 10,000,000 ergs is declared equivalent to one joule .是什么意思_Since the erg, as I have said, is an inconveniently small unit the amount of 10,000,000 ergs is declared equivalent to one joule .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句