Is the carburetor and throttle together? Is there no carburetor for EFI?

The carburetor of a traditional car is above the throttle, but they are two different things. The carburetor is on the carburetor seat, which actually changes the cross-sectional shape of the intake pipe.

EFI has no carburetor, and the EFI truck automatically controls the fuel injection quantity according to the air intake, so that the engine always works near the theoretical air-fuel ratio.