The professor convinced me through the sprightliness of her conversation.教授通过她轻快的谈话说服了我....

sprightliness的音标：sprightliness的英式发音音标为：['spraɪtlɪnəs]sprightliness的美式发音音标为：['spraɪtlɪnəs]...

n.愉快，快活...