杠杆作用

例句：

1. 1. The lever is a simple tool that can be used to lift heavy objects.
   杠杆是一种简单的工具，可以用来举起重物。
2. 2. The government's decision to cut taxes will have a significant impact on the economy.
   政府决定减税将对经济产生重大影响。
3. 3. The scientist leveraged his knowledge of physics to develop a new technology.
   这位科学家利用他对物理学的了解开发了一种新的技术。