minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves

 
  • 微小的不移棲的海洋無(wú)脊椎動(dòng)物,它們的身體呈囊狀并帶有可吸進(jìn)和吐出水的虹吸管
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国内精品美女A∨在线播放xuan