Magnachrome
玛格纳二色电影胶片法
🗣️ 情景例句
Oh, how do you do, Xiao Fu. This is Mary.
哦，你好，小付。我是Mary。
He was pale with fear.
她吓得脸色刷白。
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;
在工业部门工作和在军队中服役的许多人对噪音有切身的体会，他们认为对这个问题进行调查是浪费时间，