在矿井火灾灾变时期，井巷可通行性主要根据巷道内是否具有高温有毒有害气体而确定。
Fire hazard travel ability of shaft and roadway mainly depends on whether or not there are high temperature toxic gases in the roadway conditions.
每一个社会的现在，或过去，都存在着可通行的社会礼仪及其行为的唯一性的方方面面。
Every society that is, or ever was, has had unique facets of acceptable social courtesy and conduct.
每一个社会的现在，或过去，都存在着可通行的社会礼仪及其行为的唯一性的方方面面。
Every society that is, or ever was, has had unique facets of acceptable social courtesy and conduct.
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