Ionization energy is the minimum energy required for an atom or molecule to lose an electron.

The associative law is one of the basic laws of mathematics.

A lot of floating matter was washed up on the shore.

In marine biology, plankton is an important part of the marine ecosystem.

It is said that a wandering spirit appears in that old house.

I often go to the sea on weekends.

Umi is my best friend.

The sea breeze feels comfortable.

He found the sea on an old map.

He found the sea on an old map.