The main difficulty with this method is that it takes twice as long.这种方法的主要不便之处是要花费两倍的时间。We apologize for the inconvenience caused to passengers.我们对给乘客带来的不便之处表示歉意。Think of the inconveniences of living in a small room with a large family.不妨想想，子女众多的一家人挤在一间小房间里，生活会有多少不便之处。