骑墙者

例句：

1. 1.The leader was accused of being a "fence-sitter" in the decision to launch the war.
   领导人被指责在决定发动战争时犹豫不决。
2. 2. As a diplomat, she always tries to maintain a balance between different countries' interests.
   作为一名外交官，她总是努力在各国利益之间寻求平衡。
3. 3. The fence-sitter is often at odds with the majority opinion on important issues.
   骑墙者往往在重要问题上与大多数人意见相悖。