Mrs.Longworth, briliant conversationalist, ...请问这句话的意思，并分析句子结构，谢谢！
Mrs.Longworth, briliant conversationalist, began to talk in her usual charming manner, but all attempts to awake interest on the part of vice-president were unproductive
一、这是一个并列句
第一分句： Mrs. Longworth, brilliant conversationalist,began to talk in her usual charming manner
其中 ——
主语 —— Mrs. Longworth
同位语 —— brilliant conversationalist 进一步说明 Mrs. Longworth 的特点—— 有才气的的健谈者。
谓语动词 —— began
由不定式充当的宾语 —— to talk in her usual charming manner，（其中 in her usu
