how-everCOCA¹⁵⁸⁶⁴⁸BNC²³⁶²¹³⁺¹ 基本例句 🌏还是算了吧 The development of rural communications, how-ever, is hindered by such factors as the cost of investment, engineering implementation, operation and maintenance as well as operation effective-ness . 然而，由于投资成本、工程实施、运行维护和经营效益等因素的影响，农村通信的发展受到了阻碍。 cnki