单词	picogram
释义	pi·co·gram (pēkə-grăm′, pī-) n. One trillionth (10-12) of a gram.
随便看	oculogyric oculogyric crisis oculomotor oculomotor nerve oculus Od OD OD o.d. odalisk odalisque O'Day Odd odd Odd oddball Odd Fellow oddish oddity odd job oddjobber odd lot odd-lot oddly odd-man

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