We were a bit surprised when we found out that when we exposed frogs to very low levels of atrazine -- 0.1 parts per billion -- that it produced animals that look like this.
我们的发现令我们小吃一惊 当我们把青蛙暴露在 很低水平的阿特拉津中时，虽然10亿当中只有0.1部分， 创造出了长成这个样子的动物。