double focus method

例句：

1. 1. This double focus method has been proven to be more effective than traditional methods in improving productivity.
   这种方法已被证明比传统方法在提高生产力方面更有效。
2. 2. The engineers developed a double focus method to optimize the design of the new machine.
   工程师们开发了一种双重聚焦方法来优化新机器的设计。
3. 3. The double focus method is widely used in scientific research and has shown great potential in future development.
   双重聚焦方法在科学研究中广泛应用，并显示出巨大的潜力在未来的发展中。