Active zone depth的用法和样例：
- Neurotransmitter release during synaptic transmission is mediated by presynaptic active zone.
- Moreover, HLB-1 expression was not required for the presynaptic active zone morphology.
- The belt is a geochemically active zone and is favourable for the migration, concentration and oreforming for gold and related elements.
- Briefly presents the conceptions of system zoning and peripheral zone depth which are often encountered in the design of VAV systems, and recommends some zoning methods.