signupn.注册signn.手势；招牌；符号；迹象；正负号v.签；签名；做手势；做标记signed star domination number符号星控制数signed-magnitude arithmetic符号化数值运算signs of prohibited armaments违禁武器的踪迹signed cycle domination number符号圈控制数signed total domination number符号全控制数Sign language in story telling手语故事Signs of rebellion are evident逆迹昭彰signs of peritoneal irritation腹膜刺激征Sign posts direct travelers.路标给游客指路。signs of incipient tooth decay早期龋齿的徵象.