水肺潜水 英文介绍要水肺潜水的英文介绍,不要起源什么的,就要器材名称和使用方法以及下潜后的注意事项,不要太多,注意,要英
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水肺潜水 英文介绍
要水肺潜水的英文介绍,不要起源什么的,就要器材名称和使用方法以及下潜后的注意事项,不要太多,
注意,要英文的,中文不要!
要水肺潜水的英文介绍,不要起源什么的,就要器材名称和使用方法以及下潜后的注意事项,不要太多,
注意,要英文的,中文不要!
Scuba diving ("SCUBA" originally being an acronym for self contained underwater breathing apparatus,now widely considered a word in its own right) is a form of underwater diving in which a diver uses a scuba set to breathe underwater.
Unlike early diving,which relied exclusively on air pumped from the surface,scuba divers carry their own source of breathing gas (usually compressed air),allowing them greater freedom than with an air line.Both surface supplied and scuba diving allow divers to stay underwater significantly longer than with breath-holding techniques as used in snorkelling and free-diving.
According to the purpose of the dive,a diver usually moves underwater by swimfins attached to the feet,but external propulsion can come from an underwater vehicle,or a sled pulled from the surface.
Early diving experimenters quickly discovered it is not enough simply to supply air to breathe comfortably underwater.As one descends,in addition to the normal atmospheric pressure,water exerts increasing pressure on the chest and lungs—approximately 1 bar (14.7 pounds per square inch) for every 33 feet (10 m) of depth—so the pressure of the inhaled breath must almost exactly counter the surrounding or ambient pressure to inflate the lungs.It generally becomes difficult to breathe through a tube past three feet under the water.[3]
By always providing the breathing gas at ambient pressure,modern demand valve regulators ensure the diver can inhale and exhale naturally and virtually effortlessly,regardless of depth.
Because the diver's nose and eyes are covered by a diving mask; the diver cannot breathe in through the nose,except when wearing a full face diving mask.However,inhaling from a regulator's mouthpiece becomes second nature very quickly.
Unlike early diving,which relied exclusively on air pumped from the surface,scuba divers carry their own source of breathing gas (usually compressed air),allowing them greater freedom than with an air line.Both surface supplied and scuba diving allow divers to stay underwater significantly longer than with breath-holding techniques as used in snorkelling and free-diving.
According to the purpose of the dive,a diver usually moves underwater by swimfins attached to the feet,but external propulsion can come from an underwater vehicle,or a sled pulled from the surface.
Early diving experimenters quickly discovered it is not enough simply to supply air to breathe comfortably underwater.As one descends,in addition to the normal atmospheric pressure,water exerts increasing pressure on the chest and lungs—approximately 1 bar (14.7 pounds per square inch) for every 33 feet (10 m) of depth—so the pressure of the inhaled breath must almost exactly counter the surrounding or ambient pressure to inflate the lungs.It generally becomes difficult to breathe through a tube past three feet under the water.[3]
By always providing the breathing gas at ambient pressure,modern demand valve regulators ensure the diver can inhale and exhale naturally and virtually effortlessly,regardless of depth.
Because the diver's nose and eyes are covered by a diving mask; the diver cannot breathe in through the nose,except when wearing a full face diving mask.However,inhaling from a regulator's mouthpiece becomes second nature very quickly.
水肺潜水 英文介绍要水肺潜水的英文介绍,不要起源什么的,就要器材名称和使用方法以及下潜后的注意事项,不要太多,注意,要英
西安景点的英文介绍比如说华清池、兵马俑什么的,字数不要太多,
人类的起源介绍英文就是要阐述人类的起源 还要神话介绍不要直接插网址的
世界名酒的名称及英文鸡尾酒的要多要中文和英文不要介绍
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你的朋友给我来电话了,告诉我你潜水网络不好,让我不要担心,我知道了你安心工作吧,注意安全.翻译英文
长城英文介绍,不要太多,几句话.
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