n.（无脊椎）动质体目...

magnetotelephone的音标：magnetotelephone的英式发音音标为：[mæg'ni:təʊ'telɪfəʊn]magnetotelephone的美式发音音标为：[mæg'nitoʊ'telɪfoʊn]...

There are several other excretory mechanisms in earthworms.蚯蚓有好几种排泄机制.In the earthworm and many other invertebrates, these excretory structures are called nephridia.在蚯蚓和许多其它无脊椎动物中, 这些排泄结构称为肾管.Describe the excretory syste...

ketoaldehyde的音标：ketoaldehyde的英式发音音标为：[ke'təʊldɪhaɪd]ketoaldehyde的美式发音音标为：[ke'toʊldɪhaɪd]...