Highly Regio- and Steroselective Synthesis of Oligosaccharides using Unprotected and Lightly Protected Sugars as Starting Materials是什麼意思_Highly Regio- and Steroselective Synthesis of Oligosaccharides using Unprotected and Lightly Protected Sugars as Starting Materials在線翻譯_英語_讀音_用法_例句