攻坚克难 tackling challenges ; work hard and overcome difficulties

攻克难关 Penetrating Hard Targets ; Getting over it

攻克难点 Overcome difficulties

奥林匹克难以置信 Olympic Unbelievable

福克灾难 Fokker Scourge

克服困难 overcome difficulties

休克难治期 irreversible phase

张克难 Ke-Nan Zhang

难以克服的 formidable ; insuperable ; Insurmountable

帮助克服困难 help out