hold on to 和 hold on 有必要区分吗?

hold on to 和 hold on 有必要区分吗? hold on ,hold up,hold to,hold out分别 Hold on to your hold on to a hold on to forever hold on to the hold on to sth hold up to hold on 和 hold on to 用法的区别在哪里?hold on to 这个“to”指什么? hold on,hold onto,hold to有什么区别呢? hold on to the balloon hold on to 的意思 hold on to your love