单词 | sieve tube |
释义 | sieve /siv/noun
To sift ORIGIN: OE sife; Ger Sieb sieveˈ-like adjective
sieve of Eratosthenes /er-ə-tosˈthen-ēz/ noun (mathematics) A method of finding prime numbers, by listing all positive integers from 2 up to some given number, leaving the first number, 2, but crossing out all its multiples, leaving the second remaining number, 3, but crossing out all its multiples, and so on sieve plate noun (botany) A perforated area by which a sieve tube connects with another sieve tube noun (botany) A conducting element in phloem, consisting of thin-walled cells connected end to end with sieve plates between adjacent members have a head (or memory) like a sieve To be very forgetful |
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