在开始使用前把氢氧化钾电介质压入蓄电池.The potassium hydroxide electrolyte is forced into the cells just before use.在电介质的其余部分,单位体积的静电荷仍为零.Within the remainder of the dielectric the net charge per unit volume remains zero.样品在辐照前后,电介质特性发生了变化...
Bands of gunmen have hijacked food shipments and terrorized relief workers.几伙持枪歹徒劫持了运输的食品，还恐吓了救援人员。The superpowers pledged to maintain symmetry in their arms shipments.超级大国承诺在武器运输方面要保持数量均衡。The shipments are being expedit...