枪械英文介绍急求一篇介绍枪械的英文文章作为演讲稿,可以介绍一种也可以介绍多种,不要长篇大论,演讲2分钟的就够了,好的话有加分.

枪械英文介绍急求一篇介绍枪械的英文文章作为演讲稿,可以介绍一种也可以介绍多种,不要长篇大论,演讲2分钟的就够了,好的话有加分.
枪械英文介绍
急求一篇介绍枪械的英文文章作为演讲稿,可以介绍一种也可以介绍多种,不要长篇大论,演讲2分钟的就够了,好的话有加分.

枪械英文介绍急求一篇介绍枪械的英文文章作为演讲稿,可以介绍一种也可以介绍多种,不要长篇大论,演讲2分钟的就够了,好的话有加分.
大概就两分钟的长度
有的单词我翻译了下 其他的单词基本上都不难 句子也很容易看懂
A gun is a machine used to shoot bullets.Guns are also called "firearms".They can be of many different sizes:small enough to hold in one hand,or large enough to fire shells to sink a warship（军舰）.Guns that are small enough to be carried and used by one person all have the same basic parts:a trigger（扳机）,a barrel（枪管）,and a handle（枪柄）.The trigger is pulled by a finger to fire the bullet.The barrel guides the bullet.The handle is held by the human who will fire the gun.
In military terms,the word "firearm" is usually used for the type of weapons that soldiers carry (pistols手枪 and rifles步枪),while the word "gun" is used for larger guns that fire at higher speed.The weapons on warships and tanks are called "guns" or "turrets"炮台 (if placed on a rotating可旋转的 base),not "firearms".
Guns are very effective weapons.Guns guide bullets at a very high speed which is much more deadly than a traditional arrow.Bullets are contained within rounds,also known as cartridges(弹药桶).A cartridge consists of a bullet,a casing,Propellant（火药） and a primer（雷管）.Cartridges have different ways of being loaded into different kinds of weapons.Cartridges can be loaded directly into a firearm or into a clip,a magazine or other bullet container which is loaded into the firearm.Some firearms have their rounds loaded into the stock (or butt) of the weapon.A clip is loaded with rounds and the clip is loaded into a weapon.The magazine（弹夹） is a container for the rounds which has a spring（弹簧） that moves the bullets into place for firing.Firearms known as revolvers have a cylinder with holes that the bullets are loaded into.Modern guns are usually loaded with a magazine and are called automatic loading.

A machine gun is a fully-automatic mounted or portable firearm, usually designed to fire rifle cartridges in quick succession from an ammunition belt or large-capacity magazine, typically at a rate of...

全部展开

A machine gun is a fully-automatic mounted or portable firearm, usually designed to fire rifle cartridges in quick succession from an ammunition belt or large-capacity magazine, typically at a rate of several hundred rounds per minute. The first machine guns were manually operated, for example, by turning a hand crank.
In United States law, machine gun is a term of art for any fully-automatic firearm, and also for any component or part that will modify an existing firearm into a fully-automatic firearm.
Unlike semi-automatic firearms, which require one trigger pull per bullet fired, a machine gun is designed to fire bullets as long as the trigger is held down and ammunition is fed into the weapon. Although the term "machine gun" is often used by civilians to describe all fully automatic weapons, in military usage the term is restricted to relatively heavy weapons fired from some sort of support rather than hand-held, able to provide continuous or frequent bursts of automatic fire for as long as ammunition lasts. Machine guns are normally used against unprotected or lightly-protected personnel, or to provide suppressive fire.
Light machine guns usually have simple iron sights. A common aiming system is to alternate solid ("ball") rounds and tracer ammunition rounds (usually one tracer round for every four ball rounds), so shooters can see the trajectory and "walk" the fire into the target, and direct the fire of other soldiers.
Many heavy machine guns, such as the Browning M2 .50 caliber machine gun, are accurate enough to engage targets at great distances. During the Vietnam War, Carlos Hathcock set the record for a long-distance shot at 7382 ft (2250 m) with a .50 caliber heavy machine gun he had equipped with a telescopic sight. This led to the introduction of .50 caliber anti-materiel sniper rifles, such as the Barrett M82.

收起