quill like 羽管状
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Don't you think it looks like an antique quill pen?
你看它的样子像不像一根鹅毛笔呢？
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The Japanese use a hot piece of iron like an old-fashioned soldering iron to burn away the fluffy material from inside the quill.
日本人使用一片类似于老式烙铁的热铁片将羽茎内部的松软物质烧掉。
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