词汇	have a crack at something
释义	have a crack at something 尝试去做某事
随便看	navy troop navy twill navy twilled flannel navy type anchor Navy undersea medical officer Navy Underwater Ordnance Station navy underwater sound laboratory navy underwater sound reference laboratory navy uniform Navy Uniform Board navy uniform management information system Navy Unit Commendation Navy Unit Identification System Navy Vertical Take-of and Landing navy vessel engineering Navy Vocational Interest Inventory Navy War Contracts Relief Board Navy Warfare Publication navy warrant officer navy warship fleet Navy Weapons Bureau Navy Weapons Requirement Navy Weapon Station Navy Weather Reconnaissance Squadron Navy Weather Research Facility