1. 假装;冒充;装作
    If you simulate an action or a feeling, you pretend that you are doing it or feeling it.

    e.g. They rolled about on the Gilligan Road, simulating a bloodthirsty fight...
           他们在吉利根路上翻滚，模拟一场暴力厮杀。
    e.g. He performed a simulated striptease.
           他模仿了一段脱衣舞表演。

2. 模仿;模拟;仿造
    If you simulate an object, a substance, or a noise, you produce something that looks or sounds like it.

    e.g. The wood had been painted to simulate stone...
           木头上刷了漆以看起来像块石头。
    e.g. Smoke was used to simulate steam coming from a smashed radiator...
           用烟来模拟从撞碎的散热器中冒出的蒸气。

3. 仿真;模拟
    If you simulate a set of conditions, you create them artificially, for example in order to conduct an experiment.

    e.g. The scientist developed one model to simulate a full year of the globe's climate...
           这名科学家研制了一个模型来模拟地球全年的气候。
    e.g. Cars are tested to see how much damage they suffer in simulated crashes.
           已经对车辆进行了测试以确定其在模拟撞车试验中会遭受多大的损坏。