1·第一批行政办公室建于1799年至1820年之间。
The first executive offices were constructed between 1799 and 1820.
2·1820年的热病摧毁了哥伦比亚河地区的人民，导致十分之八的人死亡。
In the 1820's fever devastated the people of the Columbia River area, killing eight out of ten of them.
3·所有人都知道1820版本的《指示》。
Everybody knows the 1820 Indicator text.
4·1820年7月5日，医生命令他去意大利旅游。
On July 5, 1820, he was ordered to travel to Italy.
5·但到1820年，这些财产要求大部分已经消失。
But by 1820, most of these property requirements had vanished.
6·这个理论的主要支持者是Joseph von Gerlach (1820 - 1896)。
The main proponent of this theory was Joseph von Gerlach (1820-1896).
7·康内斯托加式宽轮篷车的巅峰时段是1820至1840年间。
The peak years of use for the Conestoga wagons were from 1820 to 1840.
8·换句话说，他在，1820年《指示》出版前就已经病了。
In other words, yes, he was already ill when the Indicator text was published in 1820.
9·1820年，美国男性的平均寿命是39岁[来源：steckel]。
In 1820, the average U.S. man lived to be approximately 39 years old [source: Steckel].
10·晚年不幸， 1820年后完全失去听力，但仍坚持创作。
Unfortunately in his late years , since 1820 he lost earing , but he kept on composing.