Their backs were battleship gray topped with a saw-toothed line of small yellow dorsal fins.

它们的背部是军舰的灰色，最上方是呈锯齿状的黄色背鳍。

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Their backs were battleship gray topped with a saw-toothed line of small yellow dorsal fins.

它们的背部是军舰的灰色，最上方是呈锯齿状的黄色背鳍。

youdao