suffer from 和 suffer的区别?

suffer:
1.做不及物动词,不加宾语,译为受苦.
She suffered greatly as a child.
她童年深受苦难.
2.做及物动词,译为忍受.
He could not suffer criticism.
他不能忍受别人批评他.
suffer from：
1.患(某种病); 受(某种病痛)折磨
You must have suffered from a cold.
你一定是感冒了.
2.因…而受罚〔苦, 损〕
Sometimes I still suffer from these weaknesses.
有时我还是在吃这些弱点的苦头.