bottom up

例句：

1. 1.The construction was completed from the bottom up.
   这项工程是从下往上完成的。
2. 2. The company is planning to expand its operations from the bottom up.
   该公司计划从下往上扩展其业务。
3. 3. The project was designed to be implemented from the bottom up, ensuring everyone's input was taken into account.
   该项目被设计为自上而下实施，以确保每个人的意见都被考虑到。