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...
The carpet is worn but still serviceable.地毯旧了，但还能用。When this building is repaired, it will be serviceable.这栋楼房修好后还可以住.A customer took a perfectly serviceable washing machine in for repair, only to be told it needed repla...