N a bird that migrates seasonally 候鸟
You can't find him, he is a bird of passage.
你打找不到他，他是一行踪不定的人。
I'm a bird of passage, dah-ling, just flitting through.
亲爱的，我是只飞来飞去信使鸟，为的就是完成这些。
In 1934, with the passage of the Migratory Bird Hunting Stamp Act (Act), an increasingly concerned nation took firm action to stop the destruction of migratory waterfowl and the wetlands so vital to their survival.
1934年，随着《候鸟狩猎印花税法案》的通过，为阻止对迁徙的水禽以及对水禽生存至关重要的湿地的破坏，一个日益感到担忧的国家（指美国）采取了坚决的行动。
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