a warship that can operate both on and under water

sommergibile
a type of small vehicle that is used to travel on water

barca
beneath the surface of a body of water

sott'acqua, subacqueo
to visit places one has never seen before

esplorare
the great mass of salt water that covers most of the earth's surface

oceano
the armed forces of a country

militare
a flat part of a bicycle or machine that is pushed with the foot to make it move or operate. It is typically circular and part of the mechanism that drives motion

pedale
a machine that uses steam made from boiling water to produce power and make parts move

macchina a vapore, motore a vapore
a state of armed fighting between two or more groups, nations, or states

guerra
the war that took place from the year 1914 to 1918 between the allies and the central powers

Prima Guerra Mondiale
the war that took place from the year 1939 to 1945 between the axis and the allies

Seconda Guerra Mondiale, II Guerra Mondiale
to act violently against someone or something to try to harm them

attaccare
a country or its forces that one is fighting against in a war

nemico
an internal-combustion engine that burns heavy oil

motore diesel, motore a gasolio
a device that produces electricity; may have several primary or secondary cells arranged in parallel or series

pila elettrica, batteria elettrica
newly developed and incorporating new, modern methods or technology

avanzato
a type of energy generated by splitting atoms to release their stored energy

energia nucleare
to prevent someone or something from being damaged or harmed

proteggere
someone whose job or education is about science

scienziato
the earth's surface where it is not under water

terra
to keep something in a particular place for later use, typically in a systematic or organized manner

immagazzinare
