摘要
The singing of birds is among the most common sounds in nature.We all hear these songs from time to time. But few of us have had thechance to hear one of nature’s unusual sounds-the song of the hump-backedwhale. Scientists do not know how hump-backed whales produce theirsongs. But scientist Roger Pain has an idea. Mr. Pain has
出处
《语言教育》
1989年第6期38-,36,共2页
Language Education