These crystals are then embedded in a plastic, and the plastic is extruded as a wire...然后将这些晶体嵌入一块塑料，再把塑料挤压成线。The barbed wire had left only the tiniest nick just below my right eye.带刺铁丝网在我的右眼正下方只留了非常小的划痕。...learning to w...
Right now, Hockaday's prototypes put out only a few milli - watts of power.现在, 霍克蒂的燃料电池原型只能输出几毫瓦的电力.Industrial designers sketch and create rough prototypes from foam board and other materials.工业设计者会拟出草图,用泡沫板和其他材料创建出...
Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Any two conductors separated by an insulator are said to form a capacitor.由绝缘体隔开任何两个导体就组成电容器.The FRP is an insulator to electricity, so it is good in safety.因...