Novel English jokes are easy to translate.

An old woman has a cat. This cat is very old; She can't run fast and can't bite, because she is too old. One day, the old cat saw a mouse; She jumped up and caught the mouse. But she can't bite it; So the mouse ran out of her mouth because the cat couldn't bite it.

Chinese translation

Old cat

An old woman has a cat. This cat is very old. It can't run fast and can't bite because it is too old. One day, the old cat found a mouse. It jumped up to catch the mouse. However, it can't bite the mouse. So the mouse slipped out of its mouth, because the old cat couldn't bite it.

So the old woman was very angry because the old cat didn't kill the mouse. She started hitting the cat. The cat said, "don't hit your old servant." I have served you for many years, and I am willing to help you. However, I am too old. Don't be so cruel to old people. Remember what old people do when they are young. "