millimeter
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/ˈmɪlimiːtər/
🇬🇧
/ˈmɪlimiːtə(r)/
a very small unit for measuring length, equal to one thousandth of a meter
The gap between the two parts is only one millimeter wide.
二つの部品の間の隙間はわずか1ミリメートルしかありません。