Mr.Obama said he does not want to see what he called - "petty politics" get in the way of reform.

VOA: standard.2009.07.29

This is very difficult because there are no high ladders and pressures from day-to-day work you get very much in the way of learning.

这很困难,因为学习不能一步登天,而巨大的工作压力,还存在于学习的每一天。

麻省理工公开课 - 媒体、教育、市场课程节选

And you can get to things like the macro-stressed insure, and energy flow in a much more robust way than you can even in an advanced course of magnetism.

所以你便可以更形象地理解,像微粒，能量流动,等概念,你甚至可以,比在高级课程更讲的程度深。

麻省理工公开课 - 媒体、教育、市场课程节选

West Africa's mangrove forests absorb thousands of tons of carbon dioxide, and could be a way for the region to get a foothold in the $136-billion carbon world market.

VOA: standard.2010.03.29