Burbank himself made only about＄150 from the sale of thesenew potato plants.But he was sure that，with what he knew andwh伯班克自己卖这些新的马铃薯幼苗只挣了大约150美元。但是他敢肯定凭着他所知道的和他所发现的，他可以对自然加以改进。