not necessarily

• 不见得罢

  not necessarily stop

• 天在下雨, 他不见得能来。

  It's raining, so he might not be able to come.

• 不见得是他做的。

  It's not necessarily him who did it.

• 他不见得马上就会释放的吧。

  I don't think he will necessarily be released straight away.