需品

例句：

1. 1. We need to buy some necessities for the trip.
   我们需要为这次旅行购买一些必需品。
2. 2. The essential oils are used in many household cleaning products.
   精油是许多家庭清洁产品中必不可少的成分。
3. 3. In a crisis, necessities like food and water become more important than luxury items.
   在危机时刻，食物和水这类必需品比奢侈品更重要。