vanishingly ['vænɪʃɪŋlɪ]

例句:

• Selenium and aluminum are found in vanishingly small concentrations within living things.
  硒和铝在生物中含量其微.
  
• Errors are vanishingly rare.
  错误很少,几乎没有.
  
• But even on Earth, fossils that old are vanishingly rare.
  来自NEWYORKER
• This is a vanishingly small probability.
  来自SA
• Conversely, the proportion of successes out of all those trials is vanishingly small.
  来自SA