a purine analogue,C5H4N4S,that acts as an antimetabolite by interfering with purine synthesis,used primarily in the treatment of acute leukemia是什么意思_a purine analogue,C5H4N4S,that acts as an antimetabolite by interfering with purine synthesis,used primarily in the treatment of acute leukemia在线翻译_英语_读音_用法_例句