1. 进退两难：up a stump 处境尴尬 | up a tree 进退两难 | up against the wall 碰壁

2. 处于困境：339. Take time off 停工 | 340. Up a tree 处于困境 | 341. Put off 延期

3. 陷于困境：go climb a tree 滚开 | up a tree 陷于困境 | let's make like a tree and leave 我们走吧

4. 修饰：on holiday: 在度假 | up a tree 修饰 the puma | were convinced 某人被确信、被信服 更书面化