REV IT
The engine consists of a fixed cylinder and a moving piston. The expanding combustion gases push the piston, which in turn rotates the crankshaft. ... After the piston compresses the fuel-air mixture, the spark ignites it, causing combustion. The expansion of the combustion gases pushes the piston during the power stroke.
CHEESY
Cheese is made the same way by curdling milk except the milk is curdled on purpose. Most cheese is made in factories. After milk is poured into big vats, a “starter culture” of bacteria is added to convert the lactose into lactic acid. Then an enzyme called rennet is added to curdle the milk.
TOURIST
Eiffel Tower, Paris.
The Colosseum, Rome.
Statue of Liberty, New York City.
Machu Picchu, Peru.
The Acropolis, Athens.
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