subzero temperature 零下的温度
welding at subzero temperature 负温焊接
concrete at subzero temperature 负温混凝土
cold tension at subzero temperature 负温冷拉
subzero nonfreezing temperature 零下非结冰温度
If you had crashed in an ocean, a high temperature zone, or a subzero environment, your chances of survival would be reduced to zero.
如果你迫降在海洋里，高温区域或者零度以下环境里，你的生存几率将骤减至零。
Even in summer the temperature is subzero here.
即使在夏天这里的温度也保持在零度以下。
The hardness variation of D2 steel under different quenching temperature and the influence of subzero treatment on hardness of D2 steel were studied, and its microstructure was analyzed as well.
研究了D2钢在不同温度淬火后的硬度变化，以及深冷处理对其硬度的影响，并对其显微组织进行了分析。
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