1. Drive prudently 慎重驾驶 2. Hammer out 讨论出 3. His speech hammered out the details of the plan. 他的演讲讨论出了计划的细节。 4. Build up 逐步建立 5. We are building up our savings to buy a car. 我们正在攒钱买一辆车。 6. Take apart 拆开 7. He took apart the engine and began to fix it. 他拆开发动机，开始修理它。 8. Put up 搭起 9. They put up a tent in the park for the picnic. 他们在公园里搭起了一个帐篷，准备野餐。
