(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
此前
cǐ qiánㄘˇ ㄑㄧㄢˊ
before this; before then; previously[cedict]
二
èrㄦˋ
two; 2[cedict]
四
sìㄙˋ
four; 4[cedict]
小时
xiǎo shíㄒㄧㄠˇ ㄕˊ
hour[cedict]
内服
(n,vs) internal use[edict]
过
guòㄍㄨㄛˋ
(experienced action marker); to cross; to go over; to pass (time); to celebrate (a holiday); to live; to get along; excessively; too-; surname Guo[cedict]