The midpoint and equivalence point for carbonic acid are much higher.碳酸滴定中点和等量点也高得多.Once in water, it reacts to form carbonic acid.二氧化碳一旦进入水中, 就会发生反应形成碳酸.Carbonic acid can be made into dyes and disinfectants.石炭酸可作染料、消毒剂等...
It is dangerous to lean out of the window while the bus is in motion.行车时探身窗外是危险的.Don lean out of the window of the bus. It's dangerous.在公共汽车上别探出窗外, 太危险了.Passengers are requested not to lean out of the carriage windo...