ミリは千せん分ぶんの一いちだ
miri wa senbun no ichi da
A milli is one-thousandth.
ミリは0.001だ
miri wa rei ten rei rei ichi da
A milli is 0.001.
5ミリのネジ
go miri no neji
A 5-mm screw
厚あつさは2ミリだ
atsusa wa ni miri da
The thickness is 2 mm.