The dials of most barometers are inscribed with weather terms.大多数气压计的盘面都刻有天气术语。Fixed cistern barometers are used as a standard for checking aneroid barometers.固定槽式气压计可以作为标准件去检验无液气压计.Fixed cistern barometers are used as a...
In 1957, the Soviets launched Sputnik 1 into outer space.1957年，苏联人将“斯普特尼克1号”人造卫星送入了外层空间。It is the Sputnik and is ignored at our peril.其现实意义不亚于苏联当时发射首颗人造卫星,对此视而不见是非常危险的.Explorer One went into a higher orbit than either Sp...