These goals are ambitious, but they also remind us to do one thing in the right way. ECB President Mario draghi said at a press conference following the central bank's board meeting that important changes had taken place in the resumption of negotiations. It goes without saying that the overall objective of foreign exchange investment is to achieve the greatest possible benefit of risk. As in any other venture capital, "earnings" is a function of the time required, which is not measured in terms of the monetary gain. A small profit in two or three days means that the deal is a success. On the other hand, this small interest will not be available for two or three months, even if it is a 100% profit, and it may not necessarily be cost-effective from the point of view of time. Cylinder work volume refers to the volume of gas swept by the piston from the top to the bottom, also known as single cylinder displacement, depending on the cylinder diameter and the piston stroke. Engine displacement is the total volume of working volume of each cylinder, usually expressed in milliliter (CC). Engine displacement is one of the most important structural parameters. It is more representative of engine size than cylinder diameter and cylinder number, and many indicators of engine are closely related to displacement.