n.[C]

1. 开关，电闸，电键
   You pressed the wrong switch.

   你按错了开关。

2. （铁路的）转辙器；【美】铁道侧线
3. （树林）柔软的细枝；鞭子
4. 变更，转换，更改
   There's been a switch in our plans.

   我们的计划改变了。

5. 【口】调换，交换
   I asked him why he'd made the switch.

   我问他为什么要调换。

6. （女用）长假发；（狮子等的）尾尖簇毛

vt.

1. 打开（或关掉）……的开关[（+on/off）]
   He switched the light on.

   他打开电灯。

2. 使转换；为……转接（电话）[（+to/over）]
   Hang on, please. I'll switch you to the manager.

   请不要挂断电话。我给你转接到经理那儿去。

3. 使转轨
   They switched the train to the other track.

   他们把列车转到另一轨道上。

4. 改变；转移；调动
   They switched the talk to a more interesting subject.

   他们把谈话转到比较有趣的题目上去了。

5. 【口】调换；交换
   The girls switched hats.

   女孩子交换了帽子。

6. 鞭打
   Mr. Wallace switched his son with his walking stick.

   瓦勒士先生用他的手杖打他儿子。

vi.

1. 转轨
2. 改变；转移[（+to）]
   He studied chemistry and then switched to biology.

   他原来学化学，后来改学生物。

3. 打开（或关掉）开关[（+on/off）]
4. 鞭打
5. 【口】调换；交换
   I am on duty tomorrow. I've to switch with someone to go to your party.

   我明天值班。我得和谁换一下班才能去参加你们的聚会。

n.

1. a device for making and breaking an electrical connection.
   ▸Computing  a program variable which activates or deactivates a function.
   ▸Computing  a device which forwards data packets to an appropriate part of the network.
2. a change, especially a radical one.
3. a slender, flexible shoot cut from a tree.
4. N. Amer. a set of points on a railway track.
5. a tress of hair used in hairdressing to supplement a person's natural hair.

v.

1. change in position, direction, or focus.
   ▸exchange.
2. (switch something off/on) turn an electrical device off (or on).
   ▸ (switch off) informal cease to pay attention.
3. archaic beat with or as if with a switch.