In Peiping, the braying autumn cicada, just like cricket and mouse, is simply the home insect kept in every family.
这秋蝉的嘶叫，在北平可和蟋蟀耗子一样，简直象是家家户户都养在家里的家虫。
Scientists estimate that 150-200 species of plant, insect, bird and mammal become extinct every 24 hours.
科学家估计，每过24小时，就有150至200种植物、昆虫、鸟类和哺乳动物灭绝。
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