對照品的英文：
reference substance

reference是什么意思：
n. 提到，談及；參考，查閱；證明人，介紹信
v. 查閱；參考；給（書）等附參考資料
  • The headmaster supplied him with a reference.
    校長給他提供證明人。
  • You can refer to a dictionary if necessary.
    如果有必要，你可以參考字典。
  • No referring back to books and notes!
    不準看書和筆記！
  • The department that you are refering to is not in existence.
    你所指的部門不存在了。
  • The choice of the reference temperature is inconsequential
    基準溫度的選擇是無關緊要的。
substance是什么意思：
n. 物質；實質；主旨；資產(chǎn)
  • Concentration of a substance in solution or the strength of such a substance determined by titration.
    滴定度用滴定的方式測定的一種物質的溶液濃度或這種物質的濃度
  • It's a material of substance.
    那是一種堅固的材料。
  • To spot or stain, as with a discoloring substance.
    玷污，弄贓因某種褪色物質弄臟、染污
  • Petrol is a volatile substance.
    汽油是揮發(fā)性物質。
  • This substance increases pain tolerance.
    這種物質增加對疼痛的耐受性。

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