automatic

The building has automatic doors that open when they sense someone approaching.

(Chinese) 这栋建筑装有感应到有人靠近就会打开的自动门。

Your camera has an automatic mode that adjusts the flash by itself.

(Chinese) 你的相机有一个能自行调整闪光灯的自动模式。

I prefer driving an automatic because I find shifting gears manually too difficult.

(Chinese) 我更喜欢开自动挡汽车，因为我觉得手动换挡太难了。

The rental agency only had one automatic left on the lot.

(Chinese) 租车行在停车场里只剩下一辆自动挡的车了。