normoxic helium

例句：

1. 1. The normoxic environment is conducive to plant growth.
   正常氧含量的环境有利于植物生长。
2. 2.The normoxic atmosphere protects the lungs from harmful pollutants.
   正常氧含量的大气保护肺部免受有害污染物的伤害。
3. 3. The normoxic conditions are essential for maintaining good health.
   正常氧含量的条件对于保持健康至关重要。