所述腐蚀性气体通路可为异质衬底基座杆内形成的中空内腔，该中空内腔和氮化物生长反应腔通过异质衬底隔开。
The paths of the corrosive gas can be a hollow cavity formed in the foreign substrate base bar, the hollow cavity and the nitride reacting chamber are separated by the foreign substrates.
呼吸系统的主要功用是提供空气到肺的通路及气体交换的场所。
The main function of the respiratory system is to provide passages and room for gaseous exchange.
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