Icrf
国际天球参考架
🗣️ 情景例句
It's the world's largest island, but it's also the world's smallest continent.
它是世界上最大的岛屿，同时也是世界上最小的洲。
Guess how old I am.
猜测我有多大。
Haven't you got any small change?
您没有零钱吗？