millimetre [ˈmɪlimi:tə(r)]

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n.毫米，千分之一米

a unit of length which is equal to 0.001 metres

One millimetre to the left. 往左一毫米。
It continued to lean by about 1 millimetre every year. 它一直都在以每年1毫米的速度倾斜。