Complex sentence: Thus, UltraHLE software is in fact an emulator with some parts implemented as a simulation, and the technique is not used in purist emulation projects such as MAME.
Split into simpler sentences: Thus, UltraHLE software is in fact an emulator with some parts implemented as a simulation. The HLE approach is therefore not true emulation, and the technique is not used in purist emulation projects such as MAME.