Develop, design and promote new freight service including irregular cargo charter flights, express mail, etc business model, create more profits.
开发、设计和推广新的货运产品，包括不定期货运包机、快件等业务模式，创造更大的收益。
2
The bus service is very irregular.
公共汽车非常无规律。
3
Article 3. For the purpose of these Regulations, "irregular flight" means flight in civil air transportation which does not belong to any regular air service.