One of the biggest challenges is traffic. In some areas there are marked bike lanes;

VOA: standard.2010.07.30

What are some of the particular opportunities and challenges of being a Muslim chaplain in America on a secular university campus?

美国大学中的穆斯林教士,一般都会遇到一些,什么样的机会和挑战呢？

普林斯顿公开课 - 人性课程节选

I'll then pose some of the questions and the challenges we are facing in the area of access in sustainability.

随后我将提出,在获取稳定这方面,我们所面临的问题和挑战。

麻省理工公开课 - 媒体、教育、市场课程节选

He said girls in one Dakar school explained to him some of the daily challenges they face, such as the lack of bathrooms in the school, bullying from boys, and a lack of textbooks.

VOA: standard.2010.05.19

Some of the challenges that you see here I mentioned before, so there are problems with drought, with pests, with temperature changes and the like.

我之前提到的,你们所见的这些挑战,如干旱问题,虫害问题以及温度变化之类的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

McKinsey and Hamilton have both been participants Of this projects. And what we've been trying to do is Isolate a few key areas that make sense for MIT doing Explore extensively. Now some of the challenges first Are that the technologies advance quickly.

包括McKinsey和Hamilton都是参与者,我们试图区分出一些关键领域,而不是让麻省理工做广泛的探索,现在的一些挑战在于,科学技术瞬息万变。

麻省理工公开课 - 媒体、教育、市场课程节选