译文：气体透过率：在一定的温度下，在单位时间内单位压力差下，稳定透过单位面积试样的气体体积。

Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallel surfaces of a plastic film in unit time under the conditions of test.

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译文：气体透过率：在一定的温度下，在单位时间内单位压力差下，稳定透过单位面积试样的气体体积。

Gas transmission rate: the volume of gas which, under steady conditions, crosses unit area of the sample in unit time under unit pressure difference and at constant temperature.

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译文：气体透过率(GTR)：在试验环境下，在单位时间内、单位面积上透过塑料薄膜两平行平面的特定气体总量。

Gas Transmission Rate (GTR) : the quantity of a given gas passing through a unit of the parallel surfaces of a plastic film in unit time under the conditions of test.

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