英语单词分类：危险(2)

The roads are unsafe for cyclists.
这些道路对骑车者来说不安全。
unsafe working conditions
危险的工作环境
treacherous: formal正式or literary文places or conditions that are treacherous are very dangerous for anyone who is walking， driving， climbing etc in them 〔地方或环境〕危险的
The snow turned to ice， making conditions treacherous for walkers.
雪变成了冰，对行人构成隐患。
the island"s treacherous coastline
该岛危险的海岸
perilous: ［perelas］ literary文a perilousjourney， situation etc is very dangerous〔旅行、局势等〕充满危险的
a perilous journey across the sea
一次危险的跨海之旅
high-risk: ［only before noun仅用于
名词前］ a high-risk job， situation， or
behaviour is likely to be dangerous 〔工作、局势或行为〕高风险的
Drug users need to know that sharing needles is high-risk
oehaviour.
吸毒者要知道，共用针头是很危险的做法。