High humidity means high levels of water vapor in the air - the vapor that condenses and becomes visible as "fog" on Windows of air-conditioned cars and buildings on steamy summer days.

高湿度意味着空气中水蒸汽含量高——蒸汽浓缩会成为可以看得见的“雾”，就像我们在潮湿的夏天在汽车和建筑物的空调口所见到的那样。