1.And better than all, there were young, softly rounded cheeks and bright eyes.

然而更美的，却是那些年轻柔嫩的圆圆面颊和明亮眼睛。

bright:cheerful and lively 快活而生气勃勃的

2.His eyes-and it was my destiny to know them-were large and handsome.

他的眼睛--我不得不仔细辨认的--大而美。

large and handsome:大而俊美的，一般用来形容男人的眼睛

3.Her eyes had remain young and vivacious¹.

她的眼睛非常年轻，炯炯有神。

vivacious：especially of a woman（尤指女子） having a lively, attractive personality 可爱的；活泼的；动人的

4.Her eyes rolled with curiosity.

她的眼睛因好奇而左右转动。

curiosity： strong desire to know about something 好奇心；求知欲

5.Her eyes gleamed and danced as though she were a young woman.

她眼睛闪光，眉飞色舞，仿佛她是个年轻女子。

gleam：if a person's eyes gleam with a particular emotion, or an emotion gleams in a person's eyes, the person shows that emotion （眼睛）表露出，流露出；（在眼中）闪现

6.Her eyes shone with excitement.

她眼睛里闪烁着兴奋的光芒。

shine with：绽放