例句與造句

1. "These undulating symmetrical tops provide visual excitement in an inexpensive, two-dimensional way, " he said.
2. At first, the rail section was almost symmetrical top-to-bottom, and was described as a double-headed rail.
3. They were symmetrical top-to-bottom and side to side; a seacock could be opened to fill one side with water.
4. The physics of nutation in tops and gyroscopes can be explored using the model of a " heavy symmetrical top " with its tip fixed.
5. It's difficult to find symmetrical top in a sentence. 用symmetrical top造句挺難的