To the surprise of the little boy, the door opened automatically as he approached.

令小男孩吃惊的是，在他走近时门自动打开了。

youdao

The swing door will resile automatically after it has been opened.

弹簧门被打开后可以自动弹回。

youdao

I forgot that our alarm automatically turns on at 11 PM, so when people opened the door, it went off.

我忘了我家的报警器每天晚上11点会开，有人开门它就响了。

youdao

Motorola's new Home Monitoring and Control System HMEZ1000, a system of wireless network cameras and sensors that let's you keep tabs on your home from anywhere, and will automatically email or text message you when a door or window is opened, or when the temperature or humidity hits a certain level.

ENGADGET: An evening with Motorola