It was first developed in the Roman Empire about two thousand years ago.

VOA: special.2009.09.16

It was the first place where the concept of stem cells was developed, in that if one looks carefully one can find immature cells in the bone marrow.

这是干细胞概念的发祥地,如果仔细观察造血系统,就能找到骨髓中的未成熟细胞

耶鲁公开课 - 生物医学工程探索课程节选

She was in Washington spending some time when the first food guide pyramid and dietary guidelines when being developed and she talks about that experience and how much impact the food industry had on this.

她曾在华盛顿待过一段时间,正值食物金字塔的最初版,和饮食指南被提出之时,她谈到了那段时期的一些相关经历,以及食品行业对该研究的影响有多大

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Researchers first developed an experimental vaccine against East Coast fever thirty years ago.

VOA: special.2009.11.03

But rather reason, he says, is attained by industry,by work, and it is developed first, he says, by the imposing of names on things, the correct names on things, and second by getting a good and orderly method of study.

他说，理性是通过辛勤的努力得来的，理性的形成，是通过使用事物的名称，事物正确的名称形成的，第二，是通过获得一种良好,而有有条不紊的学习方法形成的。

耶鲁公开课 - 政治哲学导论课程节选

When patent laws were first developed, most patents were for machines.

VOA: special.2010.07.16

The tests are the first step in human clinical trials of two vaccine candidates developed at the University of Cape Town.

VOA: special.2009.07.29

It advises girls to delay their first pregnancy until their bodies have fully developed.

VOA: special.2010.08.09

Those first days when Helen Keller developed the ability to talk were wonderful.

VOA: special.2009.11.08

In the early nineteen eighties, Professor Ejeta developed the first sorghum hybrid seeds.

VOA: special.2009.07.07

But scientists think the dinosaurs developed feathers first, and then wings.

VOA: special.2010.06.04

The defibrillator of today has developed from the first defibrillators.

VOA: special.2009.08.11

In that job, she developed the first liquid crystal polymer.

VOA: special.2010.02.09

Members of the first group developed pellagra.

VOA: special.2009.01.27

Swan did that and more. As he gained experience on his first expeditions, he developed a talent for raising money and hiring accomplished guides who could teach him.

VOA: standard.2009.12.10