本文研究了V波段四倍频器的设计和研制方法.This thesis presents the design and manufacture of a V - band frequency quadrupler.这种倍频器可以满意地用作为某型测速雷达的输出级.This frequency multiplier may be used satisfactorily as the output stage some velocity radar...
牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。When not removed, plaque causes tooth decay and gum disease.戒指内侧有一层厚厚的锈斑。The tarnish lay thick on the inside of the ring.她比较胖，脸色暗淡、多斑。She was rather fat, and her complexion was muddy and spotty....
A routine scan revealed abnormalities in the foetus.一次常规扫描发现胎儿畸形.The most common abnormalities associated with ASA are interatrial shunts, in particular patent foramen ovale.房间隔常常并发房内分流, 特别是在合并卵圆孔未闭时更容易发生.Such abnormalit...
聚集体结构紧密并且形状接近于球形.Aggregates are compact and close to spherical in shape.这些多聚集体只有在非常窄的温度和pH范围内方是稳定的.Such polyaggregates are stable only over very narrow temperature and pH regions.这说明星云是恒星的聚集体.This suggest that the nebula...
" Jeffrey Hollis Jr., " he managed to reply.“ 我叫小杰弗里-霍利斯, ” 他好不容易答了一声.Ralph, Jr. skateboards by. The teenagers watch him from behind the tree.小拉尔夫踏着滑板滑过. 男孩子们躲在树后看着他....Harry Connick Jr.小哈里·康尼克For about five minutes Jeff...
He would show his collection by gaslight.他会在煤气灯光下展示他的收藏品。In the gaslight she looked paler than ever.在煤气灯光下她显得比以往任何时候都苍白。He sat staring at the yellow, singing gaslight.他坐在那里,眼睛直望着那煤气灯唧唧低吟的黄色火焰....
Plants have different mechanisms of dispersal for their spores.植物传播孢子的方法各不相同。Ferns, mosses and fungi spread by means of spores.蕨类植物、苔藓和真菌通过孢子传播蔓生。When an infected mosquito bites a human, spores are injected into the bloo...