one's own lookout

1. 自己（应注意）的事
   If you want to go into that lion's cage, it's your own lookout.

   如果你愿意到狮笼里去，那是你自己的事。

on the lookout for

1. 密切注意着；费心寻觅着
   I'm on the lookout for a second-hand car.

   我正留心着想买辆二手车。

• be one's (own) lookout
  Brit. informal be one's own responsibility or problem:
  if he chooses to ignore my advice, that's his lookout.
• be on the lookout (or keep a lookout) for
  be alert to.
  ▸keep searching for.