cheer on 与 cheer up 的区别

cheer on：
向……欢呼；为……鼓劲加油.
例如：
The crowd cheered the runners on.
cheer up：
(使……)高兴起来；(使……)振作起来.
例如：
(1)You need a holiday to cheer yourself up.
(2)Cheer up!Do not be sorrowful!