Abstract 7-amino-3-chloro-cephems-3-en-4-acid(7-ACCA) is an important intermedia te in preparation of cephalosporin.是什么意思_Abstract 7-amino-3-chloro-cephems-3-en-4-acid(7-ACCA) is an important intermedia te in preparation of cephalosporin.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句