at the earliest
1. 最早
We will give you a reply on Friday at the earliest.
我们最早在星期五给你答复。
earlier on
1. 在早期; 早先
She developed a musical interest earlier on.
她在早年就对音乐产生了兴趣。
习惯用语as early as1.早在bright and early1.一大早earlier1.[early] on 稍早的时候, 刚才early and late1.从早到晚early or late1.迟早, 早晚