问题描述：
英译汉 最后一句怎么也看不懂
Any confined space 1 or 2,in which the presence of a toxic or flammable gas has been detected during an atmospheric testing,must be re-classified as a confined space 3 or 4 until the cause of the presence of the gas concerned has not been permanently determined and eliminated.
Any confined space 1 or 2,in which the presence of a toxic or flammable gas has been detected during an atmospheric testing,must be re-classified as a confined space 3 or 4 until the cause of the presence of the gas concerned has not been permanently determined and eliminated.
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