先: 名词1.(时间或次序在前的) earlier; before; first; in advance 短语和例子有言在先 make clear beforehand; 争先恐后 strive to be the first and fear to lag behind; 你不必先付款。 you don't have to pay in advance. 你先拟个提纲再写。 m
居先: antedateforegoneforewentprecedencypredateprior to
居: Ⅰ动词1.(住) reside; dwell; live 短语和例子分居 (of members of a family) live apart; 侨居国外 reside abroad; 穴居 live in caves2.(处于; 在) be (in a certain position); occupy (a place) 短语和例子居世界首位 occupy first
