Reflection of a beam of light on the diaphragm falls on a phototransistor.经膜片反射的光束照射到光敏管上.A beam of light produced by a laser can weld metals.激光器发生的光束可以焊接金属.A beam of light produced a laser can weld metals.激光器发生的光束可以焊接金属...
Edward VIII had done the unthinkable and abdicated the throne.爱德华八世竟主动逊位,真是匪夷所思。He renounced his claim to the French throne.他正式放弃对法国王位的继承权。the accession of Queen Victoria to the throne维多利亚女王即位...