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...
' Ah! most gracious Monsieur heretofore the Marquis, where is that emigrant?啊, 最仁慈的前侯爵先生, 那外满贵族在哪儿?'Rise and dress yourself , emigrant.'“ 起来,穿上衣服, 外逃分子. ”He is a British emigrant to Australia.他是个移居澳大利亚的英国人...