1 theme

2 subject

1 question

2 problem

3 issue

4 topic

5 classifier: 个 gè

1 (in) return

2 reciprocation

3 payback

4 retaliation

5 to report back

6 to reciprocate

1 to announce

2 to inform

3 report

4 newspaper

5 recompense

6 revenge

7 classifier: 份 fèn

8 classifier: 张 zhāng

1 to sign up

2 to enter one's name

3 to apply

4 to register

5 to enroll

6 to enlist

1 not daring to act for oneself (idiom)

1 to return good for evil (idiom)

2 to requite evil with good

1 to repay kindness with kindness, and repay enmity with justice (idiom, from Analects)

1 to give one's body for the nation (idiom); to spend one's whole life in the service of the country

1 lit. for a nobleman to take revenge, ten years is not too long (idiom)

2 fig. revenge is a dish best served cold