not necessarily

• 未必可能

  may not be possible

• 未必尽然

  not necessarily so

• 未必有这样的机会。

  There may not be such an opportunity.

• 他未必知道。

  He doesn't necessarily know.

• 这倒未必。

  This isn't necessarily true.

• 这些消息未必可靠。

  This information is not necessarily reliable.