The language of mathematics is a language of signs and symbols . 数学的语言就是由记号和符号组成的语言。
Historians have long been puzzled by dots , lines and symbols which have been engraved on walls , bones , and the ivory tusks of mammoths . 刻在墙壁、甲骨和长毛象的牙齿上的点、线和符号,长久以来使得史学家迷惑不解。
Historians have long been puzzled by dots, lines and symbols which have been engraved on walls, bones, and the ivory tusks of mammoths . 长期以来,历史学家们对刻划在墙壁上,骨头上和古代长毛象象牙上的点,线和符号感到迷惑不解。
Paremeters and symbols of guidedmissile flight dynamics 导弹飞行动力学参数符号