top-down fast-back parser

例句：

1. 1.The company's strategy is to top-down approach the market.
   该公司的战略是自上而下地进入市场。
2. 2. The project was designedto be top-down, with clearobjectives and a structured approach.
   该项目被设计为自上而下，目标明确且结构清晰。
3. 3. The decision-making process shouldbe top-down to ensure that alllevels of the organization are aligned.
   决策过程应自上而下进行，以确保组织各级保持一致。