Did you know that blue whales sing their songsexactly on pitch, with unbelievable accuracy?Scientists at San Francisco State University analyzedover 4,000 blue whale songs off the coast ofCalifornia. They found that all the whales produced acertain call type at exactly the same pitch — 16.02Hertz. That’s about four octaves below middle C.Even more remarkable than the fact that all thewhales sing certain notes at the same pitch, is howperfectly on pitch they always are. From note to notethe whales only vary in pitch by half a percentdifference. By comparison, the difference between C and C-sharp is six percent.

你知道吗?蓝鲸唱歌时音高十分准确。旧金山大学的科学家们分析了加利福尼亚海岸线附近的4000个蓝鲸的发声音频。他们发现蓝鲸能以相同的音高(16.02赫兹)发出某种特定声音。那正是C调下的八度音阶。更值得注意的事实是所有的蓝鲸都能用相同的音高唱歌，它们的音高总是完全相同。蓝鲸通过改变百分之一的音高来改变音符。对比显示，C调和C升调相差百分之六。

pitch n. 音高 accuracy n. 正确; 准确 octave n. 八度音阶 remarkable adj.值得注意的