yī dài
in a short while
all at once
all of a sudden
in a word
in short
in case (sth happens)
if
once (sth happens, then...)
when
in a short time
in one day
one-off (offer)
one-time
single-use
disposable (goods)
unanimous
identical (views or opinions)
the whole journey
all the way
going the same way
going in the same direction
of the same kind