switch

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【释义】：

n．❶ 【铁】转辙器．❷ (电路的)开关．❸ 枝条，软条，嫩枝．❹ (女人的)假发．

－vt．❶ 接通或关掉(电流)(on，off)：switch the radio on开收音机．❷ 使(火车、电车等)转轨：switch a train into a siding将火车转至旁轨．❸ 转变，改变· switch the conversation转变话题．❹ 以枝条抽打．❺ 甩动，突然摆动，突然抢夺：The cow switched her tail．母牛甩动尾巴．He switched the tool out of my hand．他突然从我手中把工具抢走．

－vi．(电流)接通或关断．