Gray (Gy): A measure of the absorbed dose—that is, how much radiation energy is absorbed by the body. One gray equals 1 joule of radiation energy per kilogram of matter. FLASH delivers a single dose of 40 Gy or more in a fraction of a second. Conventional radiation therapy, by contrast, may deliver a total dose of 40 to 80 Gy but over the course of several weeks.
Adapted from Maggie O'Farrell's novel, Hamnet tells the semi-fictionalised story of the death of William Shakespeare's 11-year-old son.
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Lookaround expressions enable the creation of regular expressions，更多细节参见手游
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