phase focusing

例句：

1. 1.The researchers focused on the problem of energy efficiency.
   研究人员专注于能源效率的问题。
2. 2. The team decided to phase out all electronic devices from their workplace.
   团队决定逐步淘汰所有电子设备从他们的工作场所。
3. 3. The new model is designed to phase in gradually, ensuring a smooth transition for users.
   新模型设计为逐渐引入，确保用户平滑过渡。