step forward phrasal verbphr v HELPto come and offer help, information etc 主动站出来〔提供帮助、信息等〕 Police are appealing for witnesses to step forward. 警方呼吁目击者主动站出来。
step forward• No witnesses to the robbery have yet stepped forward.• But no one stepped forward to identify the bombers.
→ step forward at step2(PHRASAL VERB)