他们不是在演唱，他们在调情说爱。

They are not singing, they are flirting with each other.

Source: Tatoeba

Sentence Composition

1 他们 tāmen they; them
=2 不是 bùshì
  1. no
  2. is not
  3. not
=2 不是 bùshi fault; blame
3 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
4 演唱 yǎnchàng
  1. to sing (for an audience)
  2. vocal performance
5 他们 tāmen they; them
6 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
7 调情 tiáoqíng to flirt
=8 说 shuì to persuade
=8 说 shuō
  1. to speak; to talk; to say
  2. to explain; to comment
  3. to scold; to tell off
  4. (bound form) theory; doctrine
=8 说 shuō variant of 说 shuō
9 爱 ài
  1. to love; to be fond of; to like
  2. affection
  3. to be inclined (to do sth); to tend to (happen)