试纸 (shì zhǐ) — test paper (e.g. litmus paper, pH paper, pregnancy test strip)

Definition

Examples

• 用试纸测一下溶液的酸碱度。
  Yòng shì zhǐ cè yí xià róng yè de suān jiǎn dù.
  Use test paper to measure the pH of the solution.
• 她用了验孕试纸，结果是阳性。
  Tā yòng le yàn yùn shì zhǐ, jié guǒ shì yáng xìng.
  She used a pregnancy test strip and the result was positive.
• 这种试纸遇酸会变红。
  Zhè zhǒng shì zhǐ yù suān huì biàn hóng.
  This kind of test paper turns red when it contacts acid.