英语演讲高手速来!学校演讲比赛,我的是艾森豪威尔的诺曼底前的动员演讲,请问怎样使我的演讲显得有力?

英语演讲高手速来!学校演讲比赛,我的是艾森豪威尔的诺曼底前的动员演讲,请问怎样使我的演讲显得有力?
如果有音频或视频就更好了!以下是文章：
                                                Order of the Day                                               Dwight D.Eisenhower   Jun.6,1944. Soldiers,Sailors and Airmen of the Allied Expeditionary Forces:You are about to embark upon the Great Crusade,toward which we have striven these many months.The eyes of the world areupon you.The hopes and prayers of liberty-loving people everywhere march with you.In company with our brave Allies and brothers-in-arms on otherFronts you will bring about the destruction of the German war machine,theelimination of Nazi tyranny over oppressed peoples of Europe,and security for ourselves in a free world.Your task will not be an easy one.Your enemy is well trained,well equippedand battle-hardened.He will fight savagely.But this is the year 1944!Much has happened since the Nazi triumphs of 1940-41.The United Nations have inflicted upon the Germans great defeats,inopen battle,man-to-man.Our air offensive has seriously reduced their strength in the air and their capacity to wage war on the ground.Our Home Fronts have given us an overwhelming superiority in weapons and munitions of war,and placed at our disposal great reserves of trained fighting men.The tide has turned!The free men of the world are marching together to Victory!I have full confidence in your courage,devotion to duty and skill in battle.We will accept nothing less than full victory!Good Luck!And let us all beseech the blessing of Almighty God upon this great and noble undertaking.

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