他记起一位朋友昔日的恩情，便写给他一封信表示感谢。

He remembered past kindness of a friend. And wrote him a thankyou letter.

youdao

他记起一位朋友昔日的恩情，便写给他一封信表示感谢。

He remembered past kindness of a friend. And wrote him a thankyou letter.

youdao