as a verb or adjective to talk about electrical devices. If someone causes an electrical device to work by pressing a switch, you say that they
.
.
注意， open 作动词或形容词使用时，不能表示打开电气设备。如果某人通过按开关打开电气设备，可以说 put on, switch on 或 turn on：It's too easy just to switch on the television（打开电视机实在是太顺手了）。如果该设备已在运转，用 on 表示：The answering machine is on（电话答录机是开着的），He cannot sleep with the light on（灯开着他睡不着）。 词典解释
1. 打开（门、窗、盖等）
If you open something such as a door, window, or lid, or if it opens, its position is changed so that it no longer covers a hole or gap.
e.g. He opened the window and looked out...
他打开窗户往外看。
e.g. The church doors would open and the crowd would surge out.
教堂的门会打开，人群会蜂拥而出。
2. 将（瓶、盒等）开封；拆开（包裹、信封等）
If you open something such as a bottle, box, parcel, or envelope, you move, remove, or cut part of it so you can take out what is inside.
e.g. The Inspector opened the packet of cigarettes...
检查员撕开了那包香烟。
e.g. The capsules are fiddly to open.
这些胶囊得小心翼翼地打开。
3. 翻开；张开；展开
If you open something such as a book, an umbrella, or your hand, or if it opens, the different parts of it move away from each other so that the inside of it can be seen.
e.g. He opened the heavy Bible...
他翻开那本厚厚的《圣经》。
e.g. She opens her umbrella, and walks up River Street...
她撑开伞，沿着河街向前走。
4. 打开（计算机文件）
If you open a computer file, you give the computer an instruction to display it on the screen.
e.g. Double click on the icon to open the file.
双击图标打开文件。
Note that you do not use
open as a verb or adjective to talk about electrical devices. If someone causes an electrical device to work by pressing a switch, you say that they
put it
on,
switch it
on, or
turn it
on.
It's too easy just to switch on the television. If the device is already working, you say that it is
on.
The answering machine is on... He cannot sleep with the light on. 注意， open 作动词或形容词使用时，不能表示打开电气设备。如果某人通过按开关打开电气设备，可以说 put on, switch on 或 turn on：It's too easy just to switch on the television（打开电视机实在是太顺手了）。如果该设备已在运转，用 on 表示：The answering machine is on（电话答录机是开着的），He cannot sleep with the light on（灯开着他睡不着）。
open 情景对话
因特网
open的反义词
A：(Go to/ Type in/ Open up) yahoo.com.
（上/输入/打开）雅虎网站。
open
B：O.K.
好的。