1. "You must learn to let it go slowly, even if it is hard to do so."
2. "We must learn to let it go slowly, even if it is very tough."
放下="let go"; 放下什么? 英语须加" let (it) go" =放下(它)...
Learn to slowly down, even if it is difficult
Gradually learn to put it down, though not an easy thing.
Learn to give up, even though it's a difficult thing.
just let it go,even it hurts