1 next in sequence

2 second

3 the second (day, time etc)

4 secondary

5 vice-

6 sub-

7 infra-

8 inferior quality

9 substandard

10 order

11 sequence

12 hypo- (chemistry)

13 classifier for enumerated events: time

1 surname Gao

1 one-off (offer)

2 one-time

3 single-use

4 disposable (goods)

1 person-times

2 visits

3 classifier for number of people participating

1 this

2 the present (meeting etc)

3 this time

4 this once

1 lit. to fight it out with sb to see who is best (idiom)

2 fig. to cross swords with

3 to lock horns

1 over and over again (idiom)

1 to take sth as a lesson for next time (idiom)

2 once bitten, twice shy

1 can't recognize tall or short (idiom); doesn't know what's what

1 to feel unconcerned and let matters rest (idiom)