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1·This variety is susceptible to fire blight.

此品种易感染火疫病。

2·Fire blight can survive in the majority part in China and might blast under suitable host plants and environmental conditions.

梨火疫病在中国的大部分地区适生，在有适宜寄主分布的地区，就可能严重发生。

3·Why not replace the shacks that blight the lives of so many poor people, thrown together out of cardboard and mud, and prone to collapsing or catching fire, with more durable structures?

为什么不将让那么多穷人生活破灭的窝棚换掉，一起从容易坍塌和着火的纸板和泥泞中搬出来，取而代之以更加经久耐用的建筑？