He tries hard to be funny, even when he shouldn't. He has a habitof saying the wrong thing at the wrong time.
他有一个在错误的时间说错话的习惯。
He is so obstinate that he still tries to defend his theory, although it has been proved wrong.
他固执极了，尽管他的理论已被证明是错的，可他还在设法为其辩护。
He always tries to hold his ground even though he is wrong.
即使错了，他也总是试图固执己见。
He always tries to hold his ground even though he is wrong.
即使错了，他也总是试图固执己见。
应用推荐