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...
Aerobic dance is conductive to the health.有氧舞蹈有助于健康.Many natural fibers decay rapidly when exposed to aerobic cultures.许多天然纤维在需氧菌的侵袭下则迅速腐坏.In contrast, aerobic exercise can reduce the concentration of triglyceride in blo...
Nat is candid about the problems she is having with Steve.娜特对她眼下和史蒂夫之间的问题毫不隐瞒。It don't look nat'ral to me.'我看这事情有些古怪. ”It's too noisy for some older people like Nat.它对于像Nat这样的老人来说太吵了....
316或317不锈钢闸板具有很好的耐腐蚀性能.Gates are available, 316 or 317 steel for corrosion resistance.闸板防喷器是石油钻井过程中的一种重要设备.Ram - type blowout preventer is important equipment used in oil drilling operation.手动或执行机构推动摇杆使扇形闸板沿轴心旋转开启,物料随即下落...