英语翻译The directivity of an antenna has been defined as “the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions”.In other words,the directivity of a nonisotropic so

英语翻译The directivity of an antenna has been defined as “the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions”.In other words,the directivity of a nonisotropic so 翻译翻译 哎 难难We know that the directivity is how much an antenna concentrates energy in one direction in preference to radiation in other directions. 英语翻译the 英语翻译-----the----- 英语翻译the-----the---- 英语翻译the more the more 英语翻译the broom behind the 英语翻译The death 英语翻译source of the 英语翻译( )( )( )the zoo 英语翻译 in the first. 英语翻译step the 英语翻译English is ---- ------- the ---- -------- ------ ---- 英语翻译TOM_____________________________________at the weekend. 英语翻译The gir___her hair____. 英语翻译Please ( )( )the blacgboard. 英语翻译___________during the flood. 英语翻译down the road