Earth Day, celebrated on April 22 each year, marks the anniversary of the birth in 1970 of the modern environmental movement in the United States.
每年4月22日的“地球日”(Earth Day)是1970年在美国诞生的现代环保活动纪念日。
The first recording in Potsdam of such teleseisms on April 17, 1889 marks the birth of the study of the structure of the Earth by means of seismic waves ( see blog January 14, 2009).
1889年4月17日在波茨坦对远震的成功记录标志着通过地震波方式研究地球结构的开始。
The birth of electric documents marks that the archives work starts to a new period.
电子文件的诞生，标志着档案工作开始进入新的时期。
This year marks the 100th anniversary of the birth of their creator, Tove Jansson, who was born in 1914 and died in 2001.
今年是“姆明”创作者托芙·扬松的100岁诞辰。扬松出生于1914年，于2001年去世。
This year marks the centenary of the birth of modern crystallography.
今年是现代晶体学诞生一百周年。 。
The birth of written languages marks the dawn of human civilization.
文字的诞生，是人类由蒙昧步入文明的标志。
The birth of written languages marks the dawn of human civilization.
文字的诞生，是人类由蒙昧步入文明的标志。
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