我们一生中都有鸟儿生活在我们周围，然而我们的观察力是如此微弱，以致我们中间许多人弄不清楚苍头燕雀是否全唱歌，说不出布谷鸟是什么颜色。
We have been surrounded by birds all our lives, yet so feeble is our observation that many of us could not tell whether or not the chaffinch sings, or the colour of the cuckoo.
我们一生中都有鸟儿生活在我们周围，然而我们的观察力是如此微弱，以致我们中间许多人弄不清楚苍头燕雀是否全唱歌，说不出布谷鸟是什么颜色。
We have been surrounded by birds all our lives, yet so feeble is our observation that many of us could not tell whether or not the chaffinch sings, or the colour of the cuckoo.
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