square one's shoulders

例句：

1. 2. 解决
   问题
2. 1. The company squared its financial losses by cutting costs.
   该公司通过削减成本来弥补其财务损失。
3. 2.He squared his shoulders and began to work on the project.
   他挺直了腰板，开始着手这个项目。
4. 3. The teacher squared the class for a lesson on grammar.
   老师为语法课做准备，整理了课堂。