a warship that can operate both on and under water

زیردریایی
زیردریاییها در جنگ دریایی در طول جنگ جهانی دوم نقش حیاتی ایفا کردند و خطوط تأمین دشمن را مختل کردند.
a type of small vehicle that is used to travel on water

قایق
beneath the surface of a body of water

زیر آب, زیردریایی
او نفسش را حبس کرد و به خودش چالش داد که تا حد امکان زیر آب بماند.
to visit places one has never seen before

سیاحت کردن, بازدید کردن
the vast body of salt water that covers most of Earth's surface

اقیانوس, آبهای اقیانوسی
the armed forces of a country

ارتش
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

پدال
پدال دوچرخه من شل است و نیاز به سفت شدن دارد.
a machine that uses steam made from boiling water to produce power and make parts move

موتور بخار, ماشین بخار
اولین موتورهای بخار با حرکت پیستونها توسط بخار کار میکردند.
a state of armed fighting between two or more groups, nations, or states

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

جنگ جهانی اول
the war that took place from the year 1939 to 1945 between the axis and the allies

جنگ جهانی دوم, جنگ جهانی II
to act violently against someone or something to try to harm them

حمله کردن, یورش بردن، ستیز کردن
a country or its forces that one is fighting against in a war

طرف مقابل (در جنگ)
a device that produces electricity; may have several primary or secondary cells arranged in parallel or series

باتری الکتریکی, پیل الکتریکی
newly developed and incorporating new, modern methods or technology

پیشرفته
ماشینآلات پیشرفته در کارخانه کارایی تولید را افزایش دادهاند.
a type of energy generated by splitting atoms to release their stored energy

انرژی هستهای
کشور در حال سرمایهگذاری در انرژی هستهای است تا وابستگی خود به سوختهای فسیلی را کاهش دهد.
to prevent someone or something from being damaged or harmed

محافظت کردن
someone whose job or education is about science

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

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

ذخیره کردن, انبار کردن
