manual fine tuning

例句：

1. 1. We need to manually fine tune the algorithm for optimal performance.
   我们需要手动微调算法以获得最佳性能。
2. 2. The engineer performed a manual fine tuning of the software to improve its stability.
   工程师对软件进行了手动精细调整以提高其稳定性。
3. 3. During the development process, we manually fine tuned the code to ensure it worked as expected.
   在开发过程中，我们手动精细调整代码以确保它按预期工作。