"The fact that a Sylvia Plath may die young does not necessarily mean an Introduction to Poetry class should carry a warning that poems may be hazardous to one's health, " he said.
像西尔维亚·普拉斯这样的诗人可能英年早逝，但这并不等于我们应该在诗歌欣赏课上警告学生：诗歌威胁身心健康。
As explained in the definitions of the NEMA Types 7 and 9. The groups (indicated by letters), which follow the type class, indicate the gas or vapor atmospheres within the hazardous locations.
在NEMA类型7和9定义中以加以说明。组(用字母标明)，标记在类性和类别之后，表示危险区域内的气体或蒸汽环境。
The groups indicated by letters, which follow the type class, indicate the gas or vapor atmospheres within the hazardous locations.
组用字母标明，标记在类性和类别之后，表示危险区域内的气体或蒸汽环境。
The groups indicated by letters, which follow the type class, indicate the gas or vapor atmospheres within the hazardous locations.
组用字母标明，标记在类性和类别之后，表示危险区域内的气体或蒸汽环境。
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