现代熔模精密铸造方法在工业生产中得到实际应用是在二十世纪四十年代。
Modern Investment Casting methods in industrial production in the practical application of the twentieth century in the 1940s.
因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。
Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.
二十世纪四十年代，以色列在巴勒斯坦带来了浩劫(nakba)。
In the forties came the nakba unleashed by Israel in Palestine.
金融服务业股票在整个美国公司盈利中的比例从二十世纪八十年代的百分之十增长到去年史上顶峰的百分之四十。
The financial-services industry’s share of total American corporate profits rose from 10% in the early 1980s to 40% at its peak last year.
梁锦生(音译)，62岁，说他的父亲和爷爷在二十世纪三十至四十年代帮忙保护文物。
Liang Jinsheng, 62, said his father and grandfather helped protect the treasures in the 1930s and '40s. But after the war, Mr.
大众文化是二十世纪三、四十年代在西方出现的一种文化现象。
As a cultural phenomenon, popular culture appeared in western countries between the 1930s and 1940s.
在中国媒体产业的纵向历史研究中，描述了媒体产业漫长的萌芽过程和二十世纪四十年代中国媒体产业的局部繁荣状态。
In the historical and vertical researches on the media industry, this thesis describes the long rudimentary history of china's media and regional prosperous state of china's media in 1940s.
二十世纪四十年代在电视进入美国千家万户以前，企业主要是通过报纸杂志与广播对其产品及服务进行宣传。
Until the late 1940s, when television began finding its way into American homes, companies relied mainly on print 1 and radio to promote their products and services.
二十世纪四十年代在电视进入美国千家万户以前，企业主要是通过报纸杂志与广播对其产品及服务进行宣传。
Until the late 1940s, when television began finding its way into American homes, companies relied mainly on print 1 and radio to promote their products and services.
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