quarternate

常见例句

• The titania photocatalysts have been research quartern century. It has characteristic of photocatalysis which is excellent performance of environmetal cleanup.
  二氧化钛光触媒已发展了25年，它具有光催化的特性，是一非常出色的环境清净的光触媒。
• quartern circle
  四分圆
• quartern
  n. 四等分;四分之一;四分之一品脱
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