bitter hop resins

例句：

1. 1. Thebitter hop resin is used in theproduction of beer.
   苦啤酒树脂用于啤酒的生产。
2. 2.The bitter hop resin has been foundto have antibacterial properties.
   苦啤酒树脂被发现具有抗菌性质。
3. 3. The bitter hopresin is a natural preservativethat can be used to preserve food forlong periods of time.
   苦啤酒树脂是一种天然防腐剂，可以长时间保存食物。