All his attempts to unlock the car were futile, because he was using the wrong key.
All his attempts to unlock the car were futile, because he was using the wrong key.
他多次尝试打开车门,但都不得要领,因为他用错了钥匙。
All his attempts to unlock the car were futile, because he was using the wrong key.
他多次尝试打开车门,但都不得要领,因为他用错了钥匙。