The number of years when the plague of locusts happened increased obviously in You, Ji and south of the Chang-Jiang River.
但蝗灾的空间分布有明显的扩大，幽、冀及江南的蝗灾发生年显著增加。
The number of years when the plague of locusts happened increased obviously in You, Ji and south of the Chang-Jiang River.
但蝗灾的空间分布有明显的扩大，幽、冀及江南的蝗灾发生年显著增加。
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