| 单词 | half-life |
| 释义 | half-life noun[C] physicsspecializeduk/ˈhɑːf.laɪf/us/ˈhæf.laɪf/thelengthoftimeneededfor theradioactivityof aradioactivesubstanceto bereducedbyhalf （放射性物质的）半衰期Physics: radiation & radioactivity
half-life| American Dictionaryhalf-life noun[Cusually sing] us/ˈhæfˌlɑɪf/physics,earth science theamountoftimeneededfor theradioactivity(=harmfulformofenergy)of aradioactivesubstanceto bereducedbyhalf Examplesofhalf-lifehalf-life It is then inactivated by hemoglobin, giving it a very short eliminationhalf-life. From theCambridge English Corpus Fluvoxamine shows the least non-linearity of pharmacokinetic parameters, withhalf-lifeincreasing from about 15 to 23 hours with multiple dosing. From theCambridge English Corpus The authors reported rates of change to more appropriate therapeutic agents that were significantly greater than expected, and as high 40% for longhalf-lifebenzodiazepines. From theCambridge English Corpus Entacapone has a similarhalf-lifeto levodopa and is usually given with each levodopa dose. From theCambridge English Corpus It has a very longhalf-lifeof 3-5 days; its significant adverse-event profile requires extremely slow dose titration every 2- 3 weeks. From theCambridge English Corpus Thehalf-lifeof output rises from 13 years to 40 years as persistence increases from none to complete. From theCambridge English Corpus Pharmacokinetic data are collected to determine thehalf-life, the maximum concentration area under-the-curve, and other parameters. From theCambridge English Corpus A cyclotron is required to produce fluorine18, a radioisotope with ahalf-lifeof less than 2 hours (110 min), which makes storage impossible. From theCambridge English Corpus In analogy, the macroproperty ofhalf-lifemay be attributed to uranium. From theCambridge English Corpus On soil thehalf-lifeof antibody-detectable slug proteins was 8.2 days while on peat it was 11.5 days. From theCambridge English Corpus No wonder most genuine attempts to establish interdisciplinary seminars have a shorthalf-life. From theCambridge English Corpus The plasmahalf-lifeof the diacid body was also measured in five of these patients. From theCambridge English Corpus Comparable studies of more groups will enable us to identify some of the taxonomic and physiological correlates of the detectabilityhalf-life. From theCambridge English Corpus When the inhibitor has a longhalf-life, fluctuations may also introduce correlations between individual replication trials. From theCambridge English Corpus Most are given three times daily, but cabergoline, which has a very longhalf-life, can be given once a day. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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