changing valve is not allowed to open to start working until 30 seconds after the motor is started这句该怎么翻译?1.改变阀门的时候不允许开启运行,要等30秒马达启动后.2.开启运行的时候改变阀门是不允许的,要等3

valve selecting a mobile phone is no easy task because technology is changing so rapidly.为什么用is changing而不用完成时态? Life is always changing, China is changing everyday selecting a mobile phone for personal use is no easy task because technology is changing so rapidly翻译 Life is changing all the Everything is changing中文是什么 time is changing,space is changing,place is changing,except my miss to you. china is changing.my home ischina is changing.my home is changing.的意思是什么? changing NO RET. valve 是什么阀 MAX. VALVE是什么阀.ELECTRO VALVE是什么阀.ZGS型号是什么泵头疼死了,在线等待 changing valve is not allowed to open to start working until 30 seconds after the motor is started这句该怎么翻译?1.改变阀门的时候不允许开启运行,要等30秒马达启动后.2.开启运行的时候改变阀门是不允许的,要等3 The world is changing all the time Shoe fashion is changing all the time Everything is changing,but nothing changes. my hometown is changing very quickly是什么意思? time is changing.系咩意思啊 Everything is changing as the times