始于

Calcification began circa 600 million years ago, when UV levels were much higher than today.

她说："钙化大约开始于6亿年前，当时的紫外辐射比现在强得多。"

The first sanctuary movement began in the 1980s, with over 500 churches and community organisations offering refuge to Central Americans who were fleeing death squads and civil wars.

首次庇护运动始于上个世纪80年代。当时，500多座教堂和社区组织收容了逃离死亡特工和内战中美洲移民。

When Ifitos made a treaty with Lycourgos the king and famous legislator of Sparta and Cleisthenes the king of Pissa.

按照传统，奥运会始于公元前776当ifitos取得了一条约了lycourgos国王和著名立委斯巴达和繁体国王的皮萨。

The golden age of American sail, which began with the fast clipper

美国航海的黄金时代，开始于1848年的快速帆船航行，在淘金热的年代里达到了

It came into being and exists in a special social background but is vulnerable to the special external environment. China grass-root democracy began from villagers self-governance system at the end of 80s and the beginning of 90s last century, during the practice of extending the mindset and awareness of democracy, villagers built up their self-governance system which main content were democratic co-optation, democratic decision-making, democratic management, democratic supervision, it forms the characteristic deputy democracy and grass-roots direct democracy combinatory democracy political structure.

中国基层民主始于上世纪80年代末90年代初的村民自治，广大农民在推进农村基层民主的实践中，逐步形成了以民主选举、民主决策、民主管理、民主监督为主要内容的村民自治体系，构成了我国独具特色的代议制民主与基层直接民主相结合的民主政治格局。

The definition of dominating set was first introduced by Konig, Berge and Ore, theirbooks and some of papers by Cockayne, Hedetniemi, Larskar and Walikar motivated interestof later researchers.

这一概念的提出始于Konig、Berge和Ore，他们的著作和Cockayne， Hedetniemi，以及Larskar和Walikar等人的文章为后来的研究者提供了有益的启示。

The process began with a May 19, 2006 colloquium at University of Washington, followed by lectures at Nokia, Microsoft, Yahoo!

这一进程始于2006年5月19号学术讨论会在华盛顿大学的演讲之后，诺基亚，微软，雅虎！

Primitive accumulation period of British colonial expansion during this period of colonial expansion, began in the 16th century until the late 18th century in the rise of the industrial revolution.

原始积累时期的殖民扩张英国在这一时期的殖民扩张，始于16世纪迄于18世纪后期工业革命的兴起。

LEAA's role in the behavior modification research began at a meeting held in 1970 in Colorado Springs.

LEAA在行为修正实验中的角色开始于1970年春天在科罗拉多举行的一次会议。

The rumor came from a tongue-in-cheek comment from Turner that he would colorize the film in order to bait critics of the process.

其实谣言始于特纳自己，在一次半开玩笑的评论中，他说如果他为本片上色的话一定会吸引评论家的眼球。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。