Word: 十八 (shíbā) 十八 dictionary entry shíbā eighteen; 18 Full dictionary entry for 十八 Example sentences using 十八 3 sentences, showing page 1 of 1. 他十八岁就离开家乡去北京求学。 Tā shíbā suì jiù líkāi jiāxiāng qù Běijīng qiúxué. He left his hometown at eighteen to go study in Beijing. 光速有声速的八十八万多倍。 Guāngsù yǒu shēngsù de bā shíbā wàn duō bèi. The speed of light is more than eighty-eight thousand times the speed of sound. 未满十八周岁不能开车。 Wèi mǎn shíbā zhōusuì bùnéng kāichē. You can't drive if you are under eighteen.