例句與造句

1. Celestial navigation systems are based on observation of the positions of the Sun, Moon, Planets and navigational stars.
2. By 1958, the celestial navigation system used by the Snark allowed its most accurate test, which appeared to fall four nautical miles ( 7.4 km ) short of the target.
3. Menzies also described how, on his home computer and with a commercial software package called Starry Night, he reconstructed the Chinese celestial navigation system and traced what he thinks is the epic round-the-world voyage of Zheng He from March 1421 to October 1423.
4. It's difficult to find celestial navigation system in a sentence. 用celestial navigation system造句挺難的