They have a bad effect on people, especially teenagers.

它们对人们产生不好的影响，尤其是青少年。

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In recent years the high rate of colliery accidents has had a very bad effect on the life and property of people and they have also drawn the attention of the society.

近年来，各地频频发生的煤矿事故，给人民的生命财产造成了极大的损失，也引起了社会的广泛关注。矿难事故频发，虽然非法开采、设备落后、意识淡薄、执法不力、罚不够狠是祸端。

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