undiluted engine oil

例句：

1. 1. The undilu-ted oil was the best choice for our engine.
   未经处理的机油是我们引擎的最佳选择。
2. 2. The food was undilu-ted and fresh from the farm.
   食物未经处理，新鲜来自农场。
3. 3.The water in this bottle is undilu-ted and pure.
   这瓶水中未经处理且纯净。