Very small tortoises must be given a shorter, carefully controlled hibernation.非常小的龟龟需要短期的, 非常小心控制下的冬眠.Ten tiny tortoises tried to talk to twenty timid toads.十个瘦小的乌龟试着和二十个胆小的蟾蜍聊天.Tortoises seem to preferentially put the ...
这种灯叫做白炽灯，其颜色取决于温度。They are called incandescent lights, and their colour depends on how hot they are.我们日常生活中用的白炽灯，是爱迪生发明的。The incandescent lamp we use in daily life was invented by Edison.灯具.第2-23部分: 特殊要求.白炽灯用备用低压照明系统.Lum...