The inner core of the Earth is mainly composed of iron and nickel.

The inner core of the Earth is extremely hot and is mainly composed of iron and nickel.

He warned about the dangers of nuclear warheads.

Nuclear reactions are used for mass production of energy.

In Japanese, the accent kernel greatly affects the pronunciation of words.

Thermonuclear reactions are the source of the sun's energy.

The use of nuclear bombs is one of the greatest threats to mankind.

The government declared a state of emergency to prevent the spread of the new coronavirus.

The rights of sexual minorities should be respected just like everyone else.

The rights of sexual minorities should be respected just like everyone else.