【昨日回顾】New sources of energy must be found，and this will take time，but it is not likely to result in any situation that will ever restore that sense of cheap and plentiful energy we have had in the times past.必须找到新的能源，而且这需要时间;而过去我们感觉到的那种能源廉价而充足的情况将不大可能再出现了。【今日长难句】For an indefinite period from here on，mankind is going to advance cautiously，and consider itself lucky that it can advance at all.【重难点词汇】mankind n. 人类for a period from here on 从现在起的一段时间内indefinite adj. 不确定的，无限的advance vi. 前进cautiously adv. 小心翼翼地【参考译文及翻译技巧】For an indefinite period from here on，mankind is going to advance cautiously, and consider itself lucky that it can advance at all.在今后的漫长的时间内，人类将谨慎前进，而它感到幸运的是它确实能够前进。1. 主干：…mankind is going to advance cautiously, and consider itself lucky …2. 修饰成分：for an indefinite period from here on 时间状语修饰整句话；that 引导从句修饰lucky【明日预告】To make the situation worse，there is as yet no sign that any slowing of the world’s population is in sight. Although the birthrate has dropped in some nations，including the United States，the population of the world seems sure to pass six billion and perhaps even seven billion as the twenty-first century opens.
