The design of a single home doorbell s indoors extension with video and interspeak based on the single chip microcomputer of AT89C2051;
基于AT89C2051的单户可视对讲门铃室内分机的设计
At present,a house and most gates of the people have doorbells,when someone rings a doorbell,the host just decides whether to open the door after often observing whether it is a frequent visitor or stranger or not,it is not very convenient.
目前,民户住宅多数门口都设有门铃,有人按门铃时,主人往往要观察是熟客还是陌生人后才决定是否应该开门,不是很方便。
He rings the bell, but no one answer.
他按门铃,但是没人开门。
The bell twinkles when you open the door.
一开门，门铃就叮当作响。
Feverish and excited, I rang at the door.
我兴奋地一个劲拉门铃。
The door bell tinkled.
门铃叮玲玲地响了起来。
The Postman Only Rings Once
邮递员只按一次门铃
"The name on the bell is Vance.
"门铃上的姓氏是万斯。
A bell, chime, or buzzer outside a door that is rung to announce the presence of a visitor or caller.
门铃门外响则表示有客来访的铃、钟或蜂鸣器
I rang and no one came to the door.
我揿揿门铃，没有人来开门。
The front door bell jangled viciously.
前门的门铃激烈地发出刺耳的声响。
The postman rang the bell because he had a parcel/package to deliver.
邮递员按门铃叫门投递包裹.
The bell of the entrance gate was heard to ring loudly.
只听大门上的门铃嘹亮地响起来。
He rang the bell but no one came to the door.
他按了门铃，可是没有人来开门。
I thought that was Nat Baker who rang the front doorbell.
我还以为是Nat Baker 按大门门铃呢。
The doorbell is ringing. I’ll call you back．
有人在按门铃。回头我再给你打。
twisted their heads around at the sound of the doorBell.
听到门铃声，他们的头转了过去
A short, timid ring at the doorbell summoned her.
一下短促的、胆怯的门铃声惊起了她。
So when the doorbell rang on the morning of my birthday,
所以我生日那天早上门铃响的时候，
I tried to wake up my wife by ringing the door-bell.
我按了门铃，想叫醒我的妻子。
