This is the basic operating principle of many thermostats.这是许多恒温箱的基本工作原理.Thermostats can be used to regulate the temperature of a room.恒温器可用来调节室内温度.Some thermostats are too sensitive and easily vibrated.有些定温器太灵敏,也容易振动....
公路货运业the road haulage industry航空货运业的天空布满变数.The sky of air - freight course of study is full of variable.传统货运业与货运相关的行业相互融合,提高货运服务质量.Traditional freight industry and freight - related industries integration to improve frei...