These are biological concepts which presuppose an understanding of internal biological processes like respiration, blood flow and digestion.
生和死是生理上的概念，了解它们要以了解像呼吸、血循环和消化等生理过程为前提。
The exchange of gases between the blood and other tissues in the body is another form of respiration, called internal respiration, or tissue respiration.
血液与人体其他组织之间的气体交换是另一种呼吸，叫做内呼吸，或组织呼吸。
These are biological concepts which presuppose an understanding of internal biological processes like respiration , blood flow and digestion.
生和死是生理上的概念，了解它们要以了解像呼吸、血循环和消化等生理过程为前提。
The exchange of gasses between the blood and other tissue in the body is another form of respiration, called internal respiration, or tissue respiration.
血液与人体其他构造之间的气体互换是另有一种呼吸，叫做内呼吸，或构造呼吸。
The exchange of gasses between the blood and other tissue in the body is another form of respiration, called internal respiration, or tissue respiration.
血液与人体其他构造之间的气体互换是另有一种呼吸，叫做内呼吸，或构造呼吸。
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