a casual friendship; a day’s acquaintance; the pleasure of a day spent together;the pleasure of knowing sb
❍ 我们虽有～，但他早就把我忘了。He forgot me long ago despite our casual friendship.
❍ 我在所有的客人中无～。All the guests were perfect strangers to me.
一日之雅yi ri zhi ya
a day’s acquaintance—not on intimate terms
一日之雅yī rì zhī yǎ
雅：交往。指短暂的交往。a day’s acquaintance, have the pleasure of knowing sb.