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单词 half-period
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half-period
half-period n. the half-life (half-life n.) of a substance; see also quot. 19041.
ΚΠ
1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 277/2 The area included in this curve is the first half period element.
1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 277/2 The effect of the whole wave can be expressed in terms of these half period components.
1905 Nature 13 Apr. 574/1 Different samples gave for the half-period of decay from 52 to 55 seconds.
1942 J. D. Stranathan ‘Particles’ of Mod. Physics xi. 448 One product of the nuclear disruption was a Ba isotope having a half period of 86 minutes.
extracted from half-comb. form
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