虛
虛 – Xu1 – Empty, False, Unreal, Vain, Feeble
虛擬 – Xu1 Ni3 – False Plan — Virtual
虛擬引擎 – Xu1 Ni3 Yin3 Qing2 – False Plan Engine (phonetic) — Virtualization Engine
仿真 – Fang3 Zhen1 – Imitate Real — Emulate
仿真器 – Fang3 Zhen1 Qi4 – Imitate Real Tool — Emulator