只有一名穿制服的无聊警卫可能偷听到了他们的谈话。Only a uniformed guard stultified with boredom might have overheard them.他说警卫会无缘无故殴打他们。The guards, he said, would punch them for no reason.警卫在拆除一段围栏好让它通过。The guards were removing a section of fenc...
而且, 这一目标或许要早于防止污染.Indeed, this strand may well predate the anti - pollution effort.在世界上大部分地区, 以重量表示价值的金属作为货币使用早于硬币.Metal, valued by weight, preceded coins in many parts of the world.测色学的基本概念早于1853年由格腊斯曼加以阐述.The basic con...
Magnetometer Device used to detect metal objects.磁性检测机检测金属物品的设备.CCM - 4 - magnetometer to measure the magnetic field is the vertical component of the fluxgate magnetometer.CCM -4 型磁力仪是测量地磁场垂直分量的磁通门磁力仪.Operation principle...