Many XML serializer tools understand this distinction between relatively safe and relatively unsafe pretty-printing.

很多 XML 序列化工具能够理解相对安全和不安全的的打印格式。

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Participants had relatively low levels of knowledge about paraffin-related safety. They had high levels of unsafe practice and their perceived risk of injury was moderate.

参与者关于煤油安全使用的知识较少，操作危险性高，对伤害危险的感知能力一般。

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