他紧握方向盘，指节发白地开车穿过暴风雨。

He drove through the storm with ___white-knuckled hands gripping the steering wheel.

在过山车急速下坠时，她紧紧抓住扶手，指节都发白了。

She held onto the roller coaster bar with ___white-knuckled grip during the steep drop.