endeavour

But I will endeavour to banish every painful thought, and think only of what will make me happy: your affection, and the invariable kindness of my dear uncle and aunt.

可是我一定会竭力打消一切苦痛的念头，只去想一些能使我高兴的事───譬如想想你的亲切以及亲爱的舅父母对我始终如一的关切。