单词：first or last
迟早, 早晚
first or last的用法和样例：
例句
- All people are fools first or last.凡人总免不了有时办傻事。
- The first or last term of a ratio or a series.首项，末项比率或数列中第一个或最后一个项
- It's even money whether the new horse comes first or last.这匹新马跑得最快或最慢的可能性是相同的。