鐘形孔 的英文怎麼說
中文拼音 [zhōngxíngkǒng]
鐘形孔
英文
bell hole-
Hands for electric clocks ; hole - shaped hands
電子鐘指針.第2部分:孔形指針The legend : the opal was treasured in the middle ages. it was called ophthalmios, or " eye stone ", because it was believed to be beneficial to the eyesight
產地：充填況積巖中的孔洞或火成巖中的礦胍，形成石筍或鐘乳石，並在化石木動物硬殼和骨骸中取代有機物。
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