In order to reconstruct the shape of scatterer d, we establish the relation between the scatterer and the far field pattern. The relation can be fixed by so called far field operator f.
为了能够重构散射体d，我们可以建立起远场模与散射体之间的联系，这种联系可以通过所谓的远场算子f来确定。
Pilots have guided the F-35 cockpit design process from the very beginning to ensure the fighter's front office is an efficient workspace that liberates the operator from unwanted distractions.
飞行员从F-35的座舱设计的最初阶段就参与其中了，以确保战斗机的正前方工作区成为一个有效的工作平台来将操作人员从无谓的分神中解放出来。
The -f operator returns true only if the file exists.
只有在文件存在时，- f操作符才返回true。
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