They climb ladders to enter some of the caves that were homes centuries ago.

VOA: special.2010.07.05

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

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