原级：undergarment
1. Each page of the calendar has a photo of one of the female students in her undergarments and a personal message to the prime minister.
2. Dripping wet and clad only in their undergarments, they were applauded for their ingenuity.
3. Wool is not the best choice to wear over top of undergarments, as it is heavy and hard to dry if it gets wet.
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4. A woman who returned a pair of undergarments was surprised that the store kept 1 yuan as " auspicious money " to bring good luck.