a good heart to lean on的意思是：
一颗善良的心
例句：
1.With a good heart to see the world, always with the spirit of optimism towardslife.
用美好的心灵看世界, 总是用乐观的精神面对人生.
2. It is a good time to jog on the Bai Causeway and Su Causeway.
这会儿正是在白堤、苏堤上慢跑的好时候.
3.He grew worse and worse, but still kept a good heart to the last.
他的病情愈来愈重, 但他仍然充满希望,直到生命的终了.