tourmaline

常見例句

用作名詞 (n.)

• Never use chemicals such as hydrofluoric acid or ammonium fluoride to clean Tourmaline because it can erode the stone.
  從來不使用化學物質如氫氟酸或氟化銨清潔電氣石，因為它可以削弱石頭。
• The main anionic finishing agents applied in textiles are tourmaline and natural ores with micro-pores and lanthanon.
  紡織品中應用的負離子整理劑主要為電氣石和加稀土元素的天然超微多孔質礦石。
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