本文设计了一种可用于LMDS中 的采用加方形脊T形 结的微波矩形波导双工器.Design of a microwave rectangular waveguide diplexer for LMDS is presented.而且, 双工器中的滤波器保持了E面的制造加工优势.In addition, the manufacturing advantages known from E - plane technology are main...
煤矿中天然存有高爆气体。Highly explosive gas is naturally found in coal mines.许多人到煤矿来,是因为契约规定必须服务几年.Many people came to the coal mineindentured for several years.煤矿工人须在地下工作.Coal miners have to work under the ground....
Listening to the scratchy recording, I recognized Walt Whitman immediately.听到沙哑的录音，我立刻知道那是沃尔特·惠特曼。He thought the poetry of Whitman barbarous.他认为惠特曼的诗歌太粗俗。Against this brilliant evocation of airlessness we may put Whitman...