If you describe a person or animal as pathetic, you mean that they are sad and weak or helpless, and they make you feel very sorry for them.
a pathetic little dog with a curly tail.
一只可怜的卷尾小狗。
The small group of onlookers presented a pathetic sight.
那一小群旁观者显出一幅可怜的样子。
If you describe someone or something as pathetic, you mean that they make you feel impatient or angry, often because they are weak or not very good.
What pathetic excuses.
多差劲的借口啊!
Don't be so pathetic.
别那么差劲。