I tried to chuff her up in vain.

我想让她高兴起来,但是白费力气.

When I was in trouble, he would chuff me up and help me.

当我遇到麻烦时, 他就会鼓励并帮助我.

When i was in trouble , he would chuff me up and help me

当我遇到麻烦时，他就会鼓励并帮助我。