以下是几项主要危险因素。
这种病正在蔓延，5岁以下的儿童都有染上该病的危险。
The disease is spreading and all children under 5 are at risk.
这疾病在蔓延，五岁以下的小孩都有危险。
The disease is spreading, and all children under five are at risk.
这种疾病正在迅速蔓延，凡十岁以下儿童均有危险。
The disease is spreading rapidly, and all children under ten are at risk.
把五岁以下的儿童独自留在家里是很危险的。
It is dangerous for children under five years old to be left alone at home.
作业危害分析只在以下定义的高危险工作中开展。
Task Hazard Analysis is only carried out for high risk works as defined below.
作业危害分析只在以下定义的高危险工作中开展。
Task Hazard Analysis is only carried out for high risk works as defined below.
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