例句與造句

1. Of note is that both the Echo 1A and Echo 2 experienced a solar sail effect due to their large size and low mass.
2. As its shiny surface was also reflective in the range of visible light, Echo 1A was easily visible to the unaided eye over most of the Earth.
3. Echo 2, being larger than Echo 1A and also orbiting in a near polar orbit, was conspicuously visible to the unaided eye over all of the Earth.
4. Echo 1A ( commonly referred to as just " Echo 1 " ) was put successfully into a orbit by another Thor-Delta, and a microwave transmission from the Jet Propulsion Laboratory in Pasadena, California, was received at Bell Laboratories in Holmdel, New Jersey, on August 12, 1960.
5. It's difficult to find echo 1a in a sentence. 用echo 1a造句挺難的