What does dual-engine car mean?

[McQuinn]

A dual-engine car is a highly efficient and low-consumption vehicle equipped with both an electric engine and a gasoline engine. Additionally, this type of car employs a special system to capture the energy generated during braking and stores it in the onboard battery. The electric engine consumes no energy when idle, remaining completely shut off, and it uses less energy than the gasoline engine during low-speed driving. The gasoline engine performs better at high speeds, delivering more power for the same engine weight, which means the electric engine is more effective in stop-and-go traffic during peak hours. The advantage of the gasoline engine is that it produces no exhaust emissions, reducing smog pollution levels, and it automatically starts to recharge the battery when the charge is low, eliminating the need for a power cord.