Europehad “lacked ambition” in its vaccine efforts from the outset, no less a sourcethan Mr Macron told a Greek television programme on March 24th.
作什么成分呢？搜了本站的其他解答，也没搞了解。
谢谢老师！
Europe had “lacked ambition” in its vaccine efforts from the outset, no less a source than Mr Macron told a Greek television programme on March 24th.
因为no less a source 这个词组含有比较级 less，应把整个比较结构包括在内。
本句 no less a source than Mr Macron told a Greek television programme on March 24th ，是前句的描写性非限制性定语。可以扩展为定语从句：
Europe had “lacked ambition” in its vaccine efforts from the outset, which was no less a source than Mr Macron told a Greek television programme on March 24th. （which 指代前面句子的内容）
剖析一下no less a source 的意思。a source 指“来源；源头”，no less a source 意思是“差不多一个来源”，引申为“同出一辙”。
【翻译】欧洲从刚开始就在疫苗方面 “缺少雄心壮志”，正如马克龙3月24日在希腊一档电视节目中所说的那样。（与马克龙3月24日在希腊一档电视节目中所说的同出一辙）
