求翻译：高、中压缸同时启动有以下优点：蒸汽同时进入高、中压缸冲动转子，这种方法可使高中压缸加热均匀，减少热应力，并能缩短启动时间。缺点是：汽缸转子膨胀情况较为复杂，胀差较难控制。是什么意思？

High and intermediate pressure cylinder at the same time start the following advantages: steam at the same time to enter the high pressure cylinder impulse rotor, this method allows high pressure cylinder, uniform heating, reduce the thermal stress, and can shorten the start-up time. The drawback is

false

High, presses the cylinder simultaneously to start has following merit: The steam simultaneously enters high, presses the cylinder impulse rotor, this method may cause the high school to press the cylinder heating to be even, reduces the thermal load, and can reduce the starting time.The shortcoming

High pressure in the cylinder at the same time start has the following advantages: steam at the same time entering the high pressure cylinder impulse rotor, this method makes the uniform heating of high and middle pressure cylinder, reducing heat stress, and can reduce the startup time. Disadvantage

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