求翻译：本研究並將此第二型態複合薄膜進行長時間，間歇性測試，而在測試時間30天內，其薄膜氣體滲透選擇能力，並無明顯改變，說明複合薄膜的分離效能穩定性良好。是什么意思？

In this study, and the second type of composite films for a long time, intermittent testing, within 30 days of the test time, the thin film gas permeability selectivity did not change significantly, the separation efficiency and good stability of composite films.

The study and to 2 patterns 複 offices for long periods film that intermittent test, and during the test within 30 days of its film gas permeability choice of capacity, without apparent change on the 複 film the separation stability effectiveness good.

This research and carries on this second state compound thin film the long time, the intermittent test, but in the test time in 30 days, its thin film gas seepage ability to select, and changes not obviously, the showing compound thin film separation potency stability is good.

This research and the second pattern films for a long time, periodically testing and test within 30 days of the time, the gas permeability of films selected, and no significant change, describes the separation efficiency stability good films.

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