1) in the later twentieth century
在二十世纪下半叶
2) Second-half 17~(th) Century
十七世纪下半叶
3) the second half of the nineteenth century
十九世纪下半叶
1.
The German and Austrian artistic songs and the French artistic songs which were composed in the second half of the nineteenth century play a very important role in the artistic song s field.
由于十九世纪下半叶德奥艺术歌曲和法国艺术歌曲在世界艺术歌曲领域中所占的重要地位,相比欧洲国家对这一时期艺术歌曲的演唱与研究的累累硕果,国内在这方面还比较落后,主要存在两大问题,其一:演唱者很难把握其作品的风格;其二:相关的乐谱、论文、书籍和音像资料很有限。
4) 1900-1950
二十世纪上半叶
1.
The Jews and the Prosperity of American Film Industry (1900-1950);
犹太人与二十世纪上半叶美国电影业的繁荣
6) 20th century next half
20世纪下半叶
1.
20th century next half is our country bassoon art obtains the considerable development important stage, in this time, the related bassoon fundamental research launches gradually and unceasingly thorough, has obtained certain achievements in scientific research.
20世纪下半叶是我国巴松管艺术得到长足发展的重要阶段,在这一时期,有关巴松管的理论研究逐渐展开并不断深入,取得了一定的科研成果。
补充资料：贾宪(约11世纪上半叶)
北宋数学家。撰《黄帝九章算法细草》九卷和《算法fea4古集》二卷，均失传。据杨辉的著作中记载，他创造了开方作法本源图(今称贾宪三角)和增乘开方法(求高次幂的正根法)，都具世界领先意义。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条