free field characteristic

例句：

1. 1.The free-field property of the material makes it ideal for use in outdoor environments.
   这种材料的无场特性使其非常适合户外使用。
2. 2.In order to improve the performance of the device, it is necessary to understand the free-field property of the materials involved.
   为了提高设备的性能，有必要了解涉及材料的自由场特性。
3. 3. The free-field property of the material has a significant impact on its durability and longevity.
   这种材料的无场特性对其耐用性和寿命有显著影响。