Western Europeans are skeptical of Washington's support for fast-tracking Ukraine and Georgian membership in the NATO alliance.

VOA: standard.2009.03.29

Right, leading trips everywhere from 7 days to 78 days, and so it was an extended wilderness tracking program.

的确，我需要带领学生们远足，时间由7天到78天不等，这是一个长时间探寻野外的项目。

普林斯顿公开课 - 人性课程节选

Before Piaget, nobody noticed that babies had this problem tracking and understanding objects.

在皮亚杰之前,并没有人注意到婴儿在追踪和理解客体上,存在着守恒的问题

耶鲁公开课 - 心理学导论课程节选

They will fire darts from small air rifles to collect blubber and skin for genetic testing,and to attach satellite-tracking tags to monitor the whales.

VOA: standard.2010.01.05

And what did--what was he tracking?

他在录什么

耶鲁公开课 - 聆听音乐课程节选

Government forces say they killed the deputy leader of the sect and appealed to the public to help in tracking fleeing members of the group.

VOA: standard.2009.07.30

The laser tracking system would work by giving space craft and satellites, which are able to be maneuvered, time to move out of the way of an incoming chunk of debris.

VOA: standard.2010.07.24

Three groups mentioned in media reports are the Iran Human Rights Documentation Center, a small nonpartisan group tracking human rights abuses in Iran, the non-partisan Freedom House, and the International Republican Institute (IRI).

VOA: standard.2009.10.28

Researchers from Brigham Young University analyzed 148 studies with a total of some 300,000 participants, tracking their social relationships and whether they survived to the end of their particular study, which averaged about seven years.

VOA: standard.2010.07.29