例句與造句

1. A patch antenna with etched holes on the ground plane is also studied . the performance of the antenna at the resonant frequency is analyzed by using the fdtd method together with the pml boundary treatment . the results show that the surface waves are suppressed greatly , the bandwidth is improved and a 1 odb reduction on the sidelobe level is achieved at the 110 and 260 directions in the e plane
   全面地研究了地面腐蝕周期圓孔結(jié)構(gòu)的電磁晶體貼片天線在基波頻率處的性能，用fdtd方法并結(jié)合pml邊界處理技術(shù)對該天線所取得的研究結(jié)果顯示，本文設(shè)計的地面腐蝕型電磁晶體結(jié)構(gòu)抑制了貼片天線中的表面波，增加了天線的帶寬，并有效地削弱了旁瓣，使天線的e面方向圖上110和260方向的兩個旁瓣被削弱了10db 。
2. It's difficult to find etch hole in a sentence. 用etch hole造句挺難的