coral hydranth的用法和樣例：
例句
- Actually, the term coral is much broader and refers to most of the animals in the class Hydrozoa of the Phylum Cnidaria.
其實珊瑚一詞所指的動物甚多，包括大多數屬珊瑚蟲綱及數動屬水螅蟲綱的刺胞動物。 - Soft coral polyps differ from hard coral polyps in that they have eight tentacles while hard corals have multiples of six.
柔軟的珊瑚蟲不同於硬珊瑚蟲，前者有八條觸鬚而硬珊瑚蟲達到軟珊瑚蟲觸鬚的六倍。
