silver dollar
noun/ˌsɪlvə ˈdɒlə(r)/
/ˌsɪlvər ˈdɑːlər/
(North American English)- a large silver coin used in the past that was worth one dollar, sometimes used now to describe the size of something
银元：过去使用的一枚大型银币，价值一美元，现在有时用来形容某物的大小 - a spider as big as a silver dollar
如同一枚银元大小的蜘蛛
- a spider as big as a silver dollar