He walked, as he said, "with the certainty of a sleepwalker," and no one ever doubted his self-assurance, while many saw from the beginning that he was engaged in a strange traffic of dreams and nightmares。他走路时，正如他说的，“像梦游者一样笃定”，从来没有人怀疑过他的自信，而许多人从一开始就看到他从事着一种奇怪的梦和噩梦的交易。
这样翻译可以么？engaged……traffic 这里翻译成“从事者……交易”么？