The study of plant resistance to insects dates back to earliest days of applied entomology . 早在应用昆虫学发展的初期，就已开始植物抗虫性的研究。
In the early 1920's, the battery industry's first "non wood" separators appeared . 早在本世纪二十年代，蓄电池工业用的首批“非木质”隔板就出现了。
He had been advertised in advance as the most sympathetic and genial officer in a division command . 他早在来前就闻得将军是师一级首长中最和蔼可亲的一位。
Light consisting of waves of some kind was known two centuries before maxwell's work . 早在麦克斯韦的研究结论之前两个世纪，人们就知道光是由某种波组成的。
Even before the invention of written language, man left records of his impressions about the natural world . 早在发明文字之前，人类就留下了他们对自然界看法的记录。
As early as 1915, g. i. taylor had made astute observations on the structure of atmospheric turbulence . 早在1915年，GITaylor就对大气湍流的结构作了巧妙的观测。
These friendly dogs, which were first brought from asia, were used as watch-dogs even in roman times . 这种跟人友善的狗起初是从亚洲带来的，早在古罗马时代就被用作看家狗。
Fluidized bed processing was first used commercially in fluid catalytic cracking of crude oil in 1941 . 早在1941年，流化床工艺过程就第一次以工业规模用于原油的流化催化裂化。
Long before 1776 the people of the thirteen colonies likewise had become a mixture of national and racial strains . 早在1776年以前，十三个殖民地的人民同样已经成了国家和种族血统的混合体。
In order to express earthquake effects in a quantitative way, intensity scales were introduced as early as the 1870's . 为了以定量方式表达地震的各种效应，早在十九世纪七十年代就采用了烈度表。
