Niánqīngrén yīnggāi wúsuǒwèijù de zhuīqiú mèngxiǎng.
Young people should fearlessly pursue their dreams.
Tips
grammar
无所畏惧 follows the classical 无所...pattern meaning 'there is nothing that...' — literally 'there is nothing to fear.' Other examples: 无所不知 (omniscient), 无所不能 (omnipotent).