Any of several sea birds, such as the fulmar, albatross, or shearwater.

信天--中航海的守护者--已濒临灭绝了。

The library is the sign of university, it is the symbol of university, and it is the important guardant of university spirit.

图书馆是学的标志，它是学的象征，它是学精神的重要守护者。