at the wheel

例句：

1. 1. She was at the wheel when the accident happened.
   事故发生时她正在驾驶。
2. 2. The driver had to take over at the wheel.
   驾驶员不得不接管驾驶。
3. 3. I'm not at the wheel when I drive my car.
   我开车时不坐在驾驶座上。