direct boiling

例句：

1. 1.To make the soup, you need to direct boil the meat for about 30 minutes.
   为了做汤，你需要将肉直接煮沸大约30分钟。
2. 2.The chef instructed us to direct boil the eggs until they were firm.
   厨师指示我们直接煮鸡蛋直到它们变硬。
3. 3.Direct boiling is a quick way to cook vegetables without adding any oil or water.
   直接煮沸是一种快速烹饪蔬菜的方法，无需添加任何油或水。