boil clear

例句：

1. 1. The water in the pot boiled clear before I added the sugar.
   在我加糖之前，锅里的水已经煮沸了。
2. 2. The soup was so thick that it didn't even need to be boiled clear.
   汤太浓了，甚至不需要煮沸就能喝。
3. 3.To make the sauce, you need to boil the tomatoes until they are very clear and the flavors come together.
   要制作酱汁，你需要将西红柿煮沸直到它们非常清澈，并且味道融合在一起。