Lured by the high profits, colliery accident has occurred frequently, but also growing.
在高利润的诱惑下,煤矿事故频繁发生,而且愈演愈烈。
The situation of safety production is severe and very serious accidents occurred frequently.
安全生产形势严峻,重特大事故频发。
Willow twig gall midge( Rhabdophaga salics Schrank) occurred frequently and caused heavy loss.
杞柳瘿蚊发生频繁,造成很大的损失。
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