雅思听力中比较经典的机经场景：时间测量手段的发展

　　时间测量手段的发展

　　是测量时间is about time measurements which are applied before。

　　先是ancient observing method(就是以前人们怎么看待时间)

　　Primitive measuring method:

　　(31) sun’s position (less important)

　　(32) animals / animals’ behaviors (more important)

　　Accuracy time needed to organize activities for:

　　(33)religion

　　(34)government

　　*** found in:

　　*** and (35)North Africa 彭彭提请注意发音

　　Table:

　　Measurement method Disadvantage

　　Sunlight clocks *** (36)varies

　　Water clocks (37)temperature influences flow

　　(38)sand glass / sound glass (39)size ***

　　Fire clocks Candles (40)disappear