A millimetre is a metric unit of length that is equal to a tenth of a centimetre or a thousandth of a metre. 毫米
noun [集合/集体] 毫米;千分之一米
The creature is a tiny centipede, just 10 millimetres long. 那个生物是一只很小的蜈蚣,只有10毫米长。
The creature is a tiny centipede, just 10 millimetres long. 那个生物是一只很小的蜈蚣,只有10毫米长。