从上世纪中叶以来，物理学家对稀有气体晶体进行了大量研究。
Since the middle of last century, physicists have all along conducted studies on the rare gas crystals.
墨菲定律由上世纪中叶一名美国空军工程师爱德华·墨菲提出。
Murphy's law is usually thought to be named after Captain Edward Murphy, a development engineer with the United States Air Force in the middle of the last century.
在上世纪中叶我国修建的一些钢桁架桥，目前大多数桥梁仍在使用。
In last century 50s, our country have built many steel-truss Bridges and most of them have still been used.
类似的事情还有3D电影。大约上世纪中叶的某个时候，全世界都认定3d电影将是电影院的未来。
Likewise, there was a time around the middle of the last century when the world was briefly convinced 3d was the future of cinema.
起初机器水平还是三年翻一倍；到了上世纪中叶就两年一翻倍(摩尔法则就是从这来的)；现在大概一年就翻一倍。
At first the machines' power doubled every three years; then in midcentury the doubling came every two years (the rate that inspired Moore's Law); now it takes only about a year.
上世纪中叶以来，西方学者对课堂教学非言语交流的广泛研究和探讨，带给我们很多启示，但毕竟远离中国实践。
From the middle of the 20th century on, western scholars have made wide researches on nonverbal communication which give us a great deal of enlightenment.
从上世纪中叶以来，随着社会各个领域对节能光源产品需求的日益增长，高效、节能的直管荧光灯得到了广泛应用。
With increasing of the requirements for energy-saving lamps in many fields, high-efficiency straight tube fluorescent lamp has been widely used in luminaires since the middle of last century.
刑事被害人学在当今受到世界范围内前所未有的重视，但在仅仅上世纪中叶前，刑事被害人却长期受到在诉讼中受到轻视甚至遗忘。
Crime victims are learning in today's unprecedented attention worldwide, but only the middle of the century ago, Crime victims have long been subject to contempt proceedings even in oblivion.
刑事被害人学在当今受到世界范围内前所未有的重视，但在仅仅上世纪中叶前，刑事被害人却长期受到在诉讼中受到轻视甚至遗忘。
Crime victims are learning in today's unprecedented attention worldwide, but only the middle of the century ago, Crime victims have long been subject to contempt proceedings even in oblivion.
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