降低

• His voice dropped to a whisper .
  他的声音降低成耳语了。
• Corrosion should not significantly reduce reliability .
  腐蚀不应明显地降低可靠性。
• His voice sank to a whisper .
  他的声音降低成了耳语。
• We now drop the condition .
  现在我们把条件降低一下。
• The pilots dropped to the altitudes under 500ft .
  飞行员将飞行高度降低到500英尺以下。
• He lowered the level of his incongruous falsetto voice .
  他降低了他那不相称的假嗓子。
• The slightest blemish can reduce market value .
  只要有一点最小的损害都会降低市场价值。
• Hearn's sharp voice softened a little with irony .
  侯恩的尖嗓子带着点讽刺，降低了调门。
• A coarser grade of iron will lower the yield of ferrocene .
  粗粒的铁将降低二茂铁的产量。
• This charge is reduced by digestion with neuraminidase .
  这一电荷被唾液酸苷酶消化而降低。