optimal information source selection

例句：

1. 1. The design of this product is optimal for its intended use.
   该产品的设计最适合其预期用途。
2. 2. The optimal solution to the problem was achieved by using a different approach.
   通过采用不同的方法，我们找到了解决这个问题的最佳方案。
3. 3. Optimal performance is achieved when the machine is set to its maximum capacity.
   当机器设置到最大容量时，性能达到最佳。