轧空头

例句：

1. 1. The factory had to flatten the metal sheet for the new machine.
   工厂不得不把金属板压平以便新机器使用。
2. 2. The carpenter carefully flattened the wooden planks before joining them together.
   木匠仔细地将木板压平后才把它们连接起来。
3. 3. The farmer used a flattening tool to smooth the ground before planting seeds.
   农民使用一个压平工具来平整土地，以便播种种子。