近二十年来夏季持续朝湿寒冷，这种最恶劣的气候条件破坏了黑琴鸡的繁衍生息，特别是雄鸟的数量从1200只减少到850只。
Consecutive cold, wet summers, the worst conditions in almost two decades, have set back recovery, with the number of males dropping from 1, 200 to 850.
他们构成了城市里没有技能的劳动力的绝大部分，是恶劣劳动条件最经常的受害者。
They make up most of the unskilled Labour in urban areas and are the most frequent victims of poor Labour conditions.
这些共有的能够使地衣抵制地球上最恶劣的环境条件。
This sharing enables lichens to resist the most adverse environmental conditions found on earth.
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