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half-life
['hɑ:flaif]
释义
n.半衰期
The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacological, physiologic, or radiological activity.
wiktionary
例句
Gus: Now, point is when our product, New Blood, goes to market, we don't want it to work too well. We want it to be a healthy habit, not a cure. You follow? The shorter the half-life, the greater the profit. (True Blood)
格斯：现在，我们的产品“新血”一旦上市，我们不想让它太有效，我们希望它是一种健康饮品，而不是药物。你懂吗？药品的半衰期越短，利润就越高。（真爱如血）
