每条触手大约两毫米长。

Each tentacle is about two millimeters long.

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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.

《柯林斯英汉双解大词典》

人类肉眼可以看到的最小的物体大约0.1毫米长。

The smallest objects that the unaided human eye can see are about 0.1 mm long.

youdao

幸运的是，这种鱼只能长到16.7毫米长。

Luckily, the fish only grows to a maximum of 16.7 mm.

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这种鱼在成熟期约长7.9毫米。

At maturity, the fish can be about 7.9 mm in length.

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这些水母只有1毫米长。

These jellyfish were only one millimeter long.

youdao

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 millimeters long.

youdao

他们从2月25日毫米长，通常是黄色，棕色，红色或黑色。

They range from 2 25 mm long and are usually yellow, brown, red, or black.

youdao

他们从2月25日毫米长，通常是黄色，棕色，红色或黑色。

They range from 2 25 mm long and are usually yellow, brown, red, or black.

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