18/01/22 22:53:03.99 8QfzS9MS.net
>>840
ありがとう。でも…
>For example, a length is a physical quantity.
>The metre is a unit of length that represents a definite predetermined length. When we say 10 metres (or 10 m), we actually mean 10 times the definite predetermined length called "metre".
この部分？当たり前のことと思うのだが。