1. No one knew exactly how many pies his thumb had explored.
   谁都不清楚他插手了多少事情。
2. You should explore ways of solving the problem.
   你们应该寻求解决问题的办法。
3. The surgeon explored the wound.
   那外科医生仔细查看伤口。
4. The forester has explored those tropical rain forests.
   那个林务员已经勘测了那些热带雨林。
5. They explored this desert region in 1923.
   他们于一九二三年在这荒漠地区探险。

　4个动词解释