A couple walking in the park noticed a young man and woman sitting Helical Structure Resulting in Optical Activity on a bench, passionately kissing.是什么意思_A couple walking in the park noticed a young man and woman sitting Helical Structure Resulting in Optical Activity on a bench, passionately kissing.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句