Our initial success led Bill Carrick to suggest we adapt what we had learned to help save the trumpeter swan. 我们的初步成功启发了比尔·卡里克,他建议我们将已经学到的本领用来帮助拯救野天鹅。
A trumpeter swan glides across the surface of the Yellowstone River. Trumpeter swans once faced extinction; today their numbers are rebounding. 一只号声天鹅滑过黄石河河面。号声天鹅一度濒临灭绝,不过现在,它们的数量正有所上升。