音标：['spikju:lә] ；

n. 针状体, 尖状晶体, 骨针
[医] 针, 刺; 交合刺

n small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals

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健康与环境

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The Republican presidential hopeful Donald Trump has called for a temporary but total ban on Muslims entering the US. Mr. Trump said that recent polling showed that many Muslims nursed hatred towards America. Jenner Bryon is in Washington. In his sta

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学英语单词

above threshold

absolute accuracy error