1.Sitting on a grassy grave…Was a little girl： 这是一句全倒装句，按正常语序可以写成:A little girl was sitting on a grassy grave．．．．

2.with her head bent back： with+名词或代词宾格十分词(或形容词，介词短语等)作状语，表示伴随情况。

3.So completely absorbed was she…that．．．： 这是一个so…that…结构的主从复合句，其中主句采用全倒装语序。address…to：对……说话。这里是指对着云彩歌唱或念念有词。that引导的是一个本身带有时间状语从句的结果状语从句。

4.in rivalry(with)：与……比高低，争雄，斗艳，等等。

5.at another violet：＝at another moment(seemed) violet：一会儿又象是紫罗兰色的．

6.take in：接受，领会。

7. Yet it was not her beauty so much as the look．．．that fascinated me, melted me：not so much．．．as作"与其说……不如说……"解释. It was…that…用作强调结构。melted me： 融化了我，即；使我陶醉。