你跑这么慢
“动车组”与“High-speed rail”没有必然联系。“动车组”未必是高速列车。====================·“动车组”是嘛？·What is "Multiple Unit"?动车组，是铁路车辆形式的一种，类似英文的“Multiple Unit”(MU)，即轨道复合单元。Chinese so-called "动车组" is similar to "Multiple Unit"(MU) in English, which is a type of railway vehicle groups.====================·“动车组”和传统的火车有嘛区别？·What are the differences between MU trains and troditional trains?区别于传统列车，动车组的单位不是单独的车辆(机车或车厢)，而是由若干特定车辆编成的组。Opposites to a troditional train, a unit of MU train is not a single vehicle(locomotive or carraige) but a group of specific vehicles.每个组元由1~多节铁路车辆组成，其中包含1~多辆带动力的车(动车)和0~多节不带动力的车(拖车)。Each group contains at least a vehicle with actuation device(Actuation Vehicle, AV) and at least 0 vehicle without actuation device(Non-Actuation Vehicle，NAV).整个组作为一个单元由司机室集中监控和操作。The entile group is under monitoring and operating from the driver's cab as a single unit.“动车组”由至少一个这样的单位组成。A MU train is conposed by at least one of such units.在运营状态下，单元内的车辆不能或很难加减，但在一定条件下可以比较方便地增减单元。When at bussiness state, it is impossible or very hard to add or remove a vehicle in the unit, but in some case, it is convenient to add or remove a unit in the entile train.即使列车由多个单元组成，通过车组间互控装置，司机仍然可以在其中一个司机室中监控和操作整列车。Thanks to the mutual-control-system(MCS) between each unit, a driver can still monitor and operate the entaile train in one of the cabs even the train is conposed by more than one unit.不过，限于车站站台的长度和车组互控系统的能力，单元不能无限增加。However, due to the length of passenger-platforms and the capacity of the MCS, the amount of the units in a single train is not unlimited.====================·“动车组”能干嘛？·What can MU trains do?一般来说，动车组的加速与减速都比传统列车快。For general cases, MU trains accelerates faster and deceleration faster than troditional trains.所以在同样的时间和里程内能比传统列车停靠更多车站。As a result, in a same period and a same path, MU trains can stop at more stations than troditional trains.同样因为这个原因，行车密度可以更大，铁路利用率更高。Also as this result, the density of the trains can be increased and the railway can be more efficient.由于加减速快，动车组常被当作公交车运用于城市内部或市郊交通，比如地铁和轻轨。Because of the high acceleration and deceleration, MU trains are often be used for inner-city trafic or environs trafic as railway buses, such as subway and so on.====================CRH1=？·庞巴迪·加拿大？CRH2=新干线E2-1000·川崎重工·日本CRH3=ICE3·西门子·德国CRH5=？·阿尔斯通·法国
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