pirate flag

1. Pirate ships often flew the flag of a friendly country as they sailed toward the ship they planned to rob.
   海盗船往往在接近目标船只的时候挂着友好国家的旗子。
2. And then I put a pirate flag there.
   而且我放进了一双船桅。
3. The pirate ship sailed under false colours: it flew the American flag until it got near, then raised the black flag.
   海盗船挂着美国国旗航行，直到驶近才升起黑旗。
4. When the pirate ship had tricked the freighter into the range of its guns, it suddenly ran down the flag it had been flying and showed its true colors.
   当海盗船巧妙地欺骗一艘货轮进入其射程距离的时候，它突然降下所悬挂的国旗，把带有骷髅图案的真实旗子挑了起来。
5. It was a pirate ship with a black flag and a crew of armed pirates.
   那是一艘海盗船，船上挂着一面黑旗，还有一群全副武装的海盗。

noun

1. a flag usually bearing a white skull and crossbones on a black background

   Synonym:    black flagJolly Rogerblackjack