Or keep the seedlings fully exposed to outdoor weather conditions – for short, but increasing periods.

或者干脆把幼苗暴置于室外环境中——暴置的时间要短，每次逐渐加长时间。

As flight  attendants and passengers step outside the cabin, their eyes need time to adjust to the dark, outdoor conditions.

当空乘人员和乘客走出机舱时，他们的眼睛需要时间来适应黑暗的室外环境。