什么是等高线

I hate those ppl who are doing terrible things to themselves while still trying to bring positiveness to others. Probably one of the best I've watched this year, but def would not wanna watch it again. The last 5 mins was terrific - then he rose up in his daughter's recitation of his fav essay that she wrote in 8th grade, it was so bright outside and he finally got to walk on that beach by the sea.