Englishfor English speakers
simulation
Noun
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A simulation of an event is when people make something that looks like the event happening, but it isn't real.
Before we watched them land on the moon, we watched a simulation so we would know what it would look like.
Doctors sometimes learn surgery in a simulation of a real operation.
To make movies you have to set up a lot of simulations.
engine
Noun
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An engine is the part of a machine which gives it power.