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National Police Agency
The National Police Agency is the organization that oversees the police organizations in Japan.
(archaic) second-person personal pronoun: you
You, what are you doing?
so-called
The so-called Shinkansen refers to Japan's high-speed railway.
(astronomy) the Solar System
The Solar System is composed of eight planets, including Earth.
a system of measurement
In this experiment, we will use the International System of Units.
coordinate system
We use this coordinate system to locate the position of an object.
(astronomy) the Milky Way
We are a part of the Milky Way.
dating website
He found her on a dating website.
an ecosystem (system of an ecological community and its environment)
The ecosystem of this lake is very fragile.
inertial frame of reference
In physics, the inertial frame of reference is a very important concept.
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