underwear

The hikers wore moisture-wicking underwear to stay dry and prevent chafing during their long trek in the heat.

(Chinese) 徒步旅行者穿着排汗内衣，以便在高温下的长途跋涉中保持干爽并防止擦伤。

In his haste to pack for the trip, John realized he had forgotten to put enough clean underwear in his suitcase.

(Chinese) 约翰在匆忙收拾行李时，意识到自己忘了在手提箱里放足够的干净内衣。