起初我们着手研究的是看起来似乎最简单和最明显的滤波器.We started with what seemed the most simple and obvious filter.在适当条件下,多层膜还可作滤波器.Under appropriate conditions a multilayer may also be employed as a filter.这个信号送到滤波器 - 放大器,它是由变压器耦合到视频检波器的.The si...
Lewis is matched against the WBO's heavyweight champion, Tommy Morrison.刘易斯对决世界拳击组织的重量级拳王汤米·莫里森。Parisi, accompanied by his eight - year - old son Carlos, won the WBO Lightweight Title in 1992.帕里西是和他8 岁 的儿子卡洛斯一起来的, 他...
The lid won't come off accidentally , it's been fastened on.盖子不会掉下来, 装得很牢.All deck fittings, windows, hatches and doors had been fastened.甲板上所有的装置、窗户、舱口盖和门都已经关牢了。I shut the door and fastened the bolt.我关上门, 拴上插销...