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PM 音标拼音: [p'i'ɛm] 相位调制 相位调制 PM n 1: an examination and dissection of a dead body to determine cause of death or the changes produced by disease [synonym: {autopsy}, {necropsy}, {postmortem}, {post-mortem}, {PM}, {postmortem examination}, {post-mortem examination}] 2: a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium [synonym: {promethium}, {Pm}, {atomic number 61}] 3: the person who holds the position of head of the government in the United Kingdom [synonym: {Prime Minister}, {PM}, {premier}] 4: modulation of the phase of the carrier wave [synonym: {phase modulation}, {PM}] (1999-01-27) Protected Mode (Intel, CPU) PM: /P·M/ 1. v. (from preventive maintenance) To bring down a machine
for inspection or test purposes. See provocative maintenance; see also scratch monkey.
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