什么是 backward?Directed or facing toward the back or rear.Done or arranged in a manner or order that is opposite to previous occurrence or normal use.Unwilling to act; reluctant; shy.Behind others in progress or development: The technology was backward, but the system worked. To or toward the back or rear.With the back leading.In a reverse manner or order.To, toward, or into the past.Toward a worse or less advanced condition.