半世纪的

In nearly half a century, the scholars of various countries have already made the rich achievement to the studying of MV- algebra and a lot of algebra systems with logic background.

近半个世纪以来，各国学者对MV-代数以及许多具有逻辑背景的代数系统的研究已取得了丰硕的成果([1]，[3-14])。

The spectral theory of graph is not only an important area in graph theory but also an active topic. There are extensive applications in the fields of quantum chemistry, physics, computer science, communication network and information science.

近半个世纪以来，谱图论形成发展成为图论研究的重要领域之一，也是一个非常活跃的研究方向，它在量子化、物理、计算机科学、通信网络及信息科学中均有广泛的应用。

Although supplies of uranium fuel were known to he limited and might become exhausted in half a century, the nuclear power plant has for a long time been a favorite project.

尽管大家知道铀燃料的供应是有限的，而且可能在半个世纪内耗尽，原子能发电站多年来却一直是特别受人喜爱的项目。

Until the second half of the 19th century, the marine resource was regarded inexhaustible according to the Hugo Grotius.

在19世纪后半叶之前，按照格老秀斯的观点，海洋渔业资源是取之不尽，用之不竭的，后来人类发现这是不正确的。

The first sulfuric acid in the world was prepared by destructive distillation of green vitriol［ferrous sulfate FeSO4.7H2O］in the second half of 15th century.

世界上最早的硫酸，产生于15世纪后半叶，当时的原料为绿矾石［FeSO4.7H2O］，通过对其加热分解和吸收制出硫酸。

Examples of Mythology themed games include Ra, Odin's Ravens and Cyclades.

这类的主题通常包括了超自然元素例如神只、半神和预言、创世纪，这类通常会符合一般民俗故事中宗教性或神性的形式。

That kind of security, commonplace around the world a half-century later, was so unusual for SHAEF in 1944 that it left an impression of panic.

尽管半个世纪后，这种安全保护措施在世界各地已经见怪不怪，但对1944年时的盟军最高统帅部来说，却还是显得不同寻常，因而给人造成了某种慌乱惊恐的印象。

In the second half of the 15th century, the spirit of the age spread to Germany and the Low Countries , where the development of the printing press (ca. 1450) and early Renaissance artists like the painters Jan van Eyck (1395-1441) and Hieronymus Bosch (1450-1516) and the composers Johannes Ockeghem (1410-1497), Jacob Obrecht (1457-1505) and Josquin des Prez (1455-1521), predated the influence from Italy.

15世纪后半叶，时代精神传播到德国和低地国家，在这些地方印刷机与文艺复兴早期艺术家，如画家扬·范·艾克，希罗尼穆斯·博斯，作曲家约翰内斯·奥克冈，若斯坎·德普雷，雅各布·奥布雷赫特的发展早于来自意大利的影响。

In the second half of the 15th century, the spirit of the age spread to Germany and the Low Countries , where the development of the printing press (ca. 1450) and early Renaissance artists like the painters Jan van Eyck (1395-1441) and Hieronymus Bosch (1450-1516) and the composers Johannes Ockeghem (1410-1497), Jacob Obrecht (1457-1505) and Josquin des Prez (1455-1521), predated the influence from Italy.

15世纪后半叶，时代精神传播到德国和低地国家，在这些地方印刷机与文艺复兴早期艺术家，如画家扬·范·艾克，希罗尼穆斯·博斯，作曲家约翰内斯·奥克冈，若斯坎·德普雷，雅各布·奥布雷赫特的发展早於来自意大利的影响。

In the second half of the 15th century, the spirit of the age spread to Germany and the Low Countries , where the development of the printing press (ca. 1450) and early Renaissance artists like the painters Jan van Eyck (1395-1441) and Hieronymus Bosch (1450-1516) and the composers Johannes Ockeghem (1410-1497), Jacob Obrecht (1457-1505) and Josquin des Prez (1455-1521), predated the influence from Italy.

15世纪后半叶，时代精神传播到德国和低地国家，在这些地方印刷机与文艺复兴早期艺术家，如画家扬·范·艾克，希罗尼穆斯·博斯，作曲家约翰内斯·奥克冈，若斯坎·德普雷，雅各布·奥布雷赫特的发展早於来自义大利的影响。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！