1.护膝
1.a covering that protects the knee from injury, especially during sports
1.I strongly recommend to those who want to indulge in this sport that they wear helmets and kneepads .
我强烈建议那些沉浸在这种运动的人要戴头盔和护膝。
2.For protection, they WILL wear kneepads.
作为安全保护,它们都得戴着护膝。