1. A computing system comprising: a dialogue gateway, a central controller, a manual aided understanding (MAU) workstation, a robot, an expression database, a response database, and a response generator, wherein, wherein the dialogue gateway is configured to receive a natural expression, to transmit the natural expression to the central controller for subsequent processing, and to transmit a response to the natural expression; wherein the central controller is configured to receives the natural expression from the dialogue gateway, to cooperate with the robot and the MAU workstation to convert the natural expression to a standard expression, and instruct the response generator according to the standard expression to generate a standard response corresponding to the standard expression; wherein the robot is configured to convert the natural expression input to language information that can be processed by a computer, and to convert the language information to the standard expression using the expression database; wherein the MAU workstation is configured to present the natural expression via a manual-agent interface, to receive the standard expression in input data received via manual-agent interface, and to transmit the standard expression to the central controller; wherein the expression database is configured to store expression-related data, which includes: language information data associated with the natural expression, standard expression data associated with the standard expression, and data associated with a relationship between the language information and the standard expression; wherein the response database stores response-related data, including standard response data for invocation, data for generating the response, or both; and wherein the response generator is configured to receives instructions of the central controller, and to generate the response for the natural expression using the data in the response database.