draconic year造句

例句与造句

1. This is called the draconic year or eclipse year.
2. Ascending-node eclipses recur after one draconic year on average, which is about 0.94901 Gregorian years, and the same goes for descending-node eclipses.
3. Secondly, the orbital nodes of the Moon eclipse or draconic year : about 346.6201 d, which is about year shorter than a sidereal year because of the precession of the nodes.
4. For about half of this draconic year, the sun is north of the lunar equator ( but at most 1.543?), and for the other half it is south of the lunar equator.
5. It's difficult to find draconic year in a sentence. 用draconic year造句挺难的