始于

Firstlady Michelle Obama and daughters Malia and Sasha helped President Barack Obama press a button to light the tree, an annual tradition since the 1920s.

奥巴马在第一夫人米歇尔和女儿玛丽亚、萨莎的帮助下，按下按钮，点亮了圣诞树，这项一年一度的传统始于上世纪20年代。

The establishment of the current basic cadastre system in China, which can retrospect to the first land use investigation at the beginning of the 1980s, aims at investigating the actuality of the use of land and the whole status.

我国现阶段土地调查体系的建立，始于上世纪80年代初的第一轮土地利用调查。

Repair work finally started in 1986 and a team of 15 Indian experts began work with 400 Cambodian workers.

修理工作最终开始于1986年，一个15人有印度专家组和400名柬埔寨工人开始了工作。

Whether it's line workers or engineers, we're finding the candlepower of our employees here as good as or better than anywhere in the world," says Nick Reilly, a top executive at General Motors in Shanghai."It all starts with the emphasis families put on the importance of education. That puts pressure on the government to deliver a decent system.

不论是流水线工人，还是工程师，我们发现这里的雇员比世界其他地方一样好，甚至更好"，上海通用汽车的高官Nick Reilly说："一切始于家庭重视教育，继而压力传导使政府重视制度体系建设

A substantial precipitation of cementite begins at 600℉(315℃), which produces a decrease in hardness.

渗碳体的大量析出开始于 600℉(315℃)，这使硬度下降。

Every crochet project starts with chain stitch, and most use single crochet or double crochet.

每一个项目始于钩针链缝，钩针，最常使用单一或双钩针。

New data of structural styles and geochronometry in the Dulong-Song Chay metamorphic dome indicate at least two epoches of major extensional tectonics: the D, deformation of the rising and exhumation of the dome occurred at 237-228 Ma; and the D2 deformation overprinted and re-deformed on the dome at 86-78 Ma. Of them, the D, deformation shows a consistent forming time, extensional direction and tectonic regime amongst the Dulong-Song Chay dome, South China block and the north margin of the South China Sea basin.

对位于华南地块西南缘的都龙－Song Chay变质穹隆体的研究表明，在中生代至新生代时期，至少经历了2期重要的伸展构造：D1期(237~228 Ma)穹隆的隆升与表露阶段，代表了印支期造山作用前的伸展构造；D2期(86~78 Ma)叠加和改造阶段，并有可能始于176~146 Ma，致使穹隆进一步隆升和表露。D2期构造在发育时间、伸展方向及变形方式等上既与华南地块同时期区域伸展构造特征相一致，也与南海盆地北缘早期扩张特征相一致。

In 1985 the Hubei Province fishery science research institute to domestic introduced the American Procambarus clarkii and the paddy rice crop rotation's situation and the method, in 1991 proposed once more Cleveland original chela shrimp and the middle-season rice crop rotation are the tendencies which is worth taking seriously.

克氏原螯虾与水稻轮作最早起始于美国，后传入非洲。1985年湖北省水产科学研究所向国内介绍了美国克氏原螯虾与水稻轮作的情况和方法，1991年再次提出克氏原螯虾与中稻轮作是一个值得重视的动态。

Our support for human rights begins with The Chevron Way, a statement of values that guide our actions.

我们对人权的支持始于雪佛龙路，值的声明，指导我们的行动。

The tradition of sending Christmas cards begun in 1843 – about the same time as the first Christmas seal was published.

发送圣诞贺卡的传统开始于1843年，大约与此同时防痨邮票也开始发行。

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。