例文
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- Inside the city were artificial earth mounds and natural hills.
- This phenomenon is quite noticeable for artificial Earth satellites, especially those in low orbits.
- The quarterwave length of wire can be regarded as an artificial earth for RF purposes.
- The first artificial Earth satellite was Sputnik 1.
- 1st Aero was responsible for tracking all artificial earth satellites, space probes, carrier rockets, and debris, US and foreign.