ambulacral

ambulacral的音标是[æm"bjuːlækərəl]，翻译为“蔓足的；蔓足的附属器”。

速记技巧：这个单词中包含的字母可以简化记忆，如“ambulacrum”可以联想到“蔓足”，“ral”可以联想到“related to（与……相关）”。通过联想记忆，可以更快地拼写和记忆单词。

Ambulacral这个词源自拉丁语，意为“行走的”，它来源于ambulare这个词，这个词的意思是“行走，散步”。

这个词的变化形式有：过去式是ambulavi，过去分词是ambulatus，现在分词是ambulacral，形容词是ambulacral-。

相关单词有：

1. ambulance（救护车）：这个词是由ambulacrum（意为“救护场所”）和-ce（表示名词）组成的。它通常用来指代用于紧急医疗服务的车辆。

2. ambulacrum（救护场所）：这个词的意思是救护车停放的地方，它来源于ambulacrum，表示救护车停放的地方。

3. ambulacy（救护队）：这个词是由ambulans（意为“行走”）和-cy（表示名词）组成的。它通常用来指代由志愿者组成的救护队。

以上这些单词都与“行走”这个概念有关，也与医疗和紧急服务有关。这些单词在英语中广泛使用，并被用来描述与医疗和紧急服务相关的各种概念和场景。

ambulacral常用短语：

1. ambulacral system：蔓足类蔓足类蔓足类系统

例句：The ambulacral system of the shell is a typical example of the coelom in molluscs.

2. ambulacral groove：蔓足类蔓足类蔓足类凹沟

例句：The ambulacral groove is a typical example of the coelom in molluscs.

3. ambulacral tube：蔓足类蔓足类蔓足类管

例句：The ambulacral tube is a typical example of the coelom in annelids.

英文小作文：

Coelom is a common feature of animals, and it is found in many different types of animals, including humans. However, it is also found in some marine invertebrates, such as the marine snail, and it is particularly prominent in some marine worms, known as the marine annelids. One type of annelid that is particularly interesting is the marine worm known as the "ambulacra".

The ambulacra are long, thin worms that have a unique structure that allows them to move through the sand quickly and efficiently. They have a series of long, thin tubes that run along their body, and these tubes are connected to each other by a series of small pores that allow oxygen and nutrients to pass through. This unique structure allows the ambulacra to move quickly and efficiently through the sand, and it also allows them to survive in very harsh environments.

In conclusion, the ambulacra are an interesting type of marine worm that have a unique structure that allows them to move quickly and efficiently through the sand. Their coelom system provides them with oxygen and nutrients that they need to survive in such harsh environments.