REM sleep, when most dreams occur, is characterized by rapid eye movement, muscle twitches, and an active brain.
做梦时，大多表现为眼睛的速动、肌肉痉挛以及活跃的大脑，都叫作眼球速动的睡眠。
Slips of the tongue, headaches, backache and other pains, dizziness, light-headedness, numbness, muscle twitches, jerks, cramps, and tremors all occur in totally healthy persons.
像口误（slipsofthetongue）、头痛、背痛和其他疼痛、头晕、肌肉抽搐或抽动、痉挛性震颤等，都是完全健康者也可能发生的。
Slips of the tongue, headaches, backache and other pains, dizziness, light-headedness, numbness, muscle twitches, jerks, cramps, and tremors all occur in totally healthy persons.
像口误（slipsofthetongue）、头痛、背痛和其他疼痛、头晕、肌肉抽搐或抽动、痉挛性震颤等，都是完全健康者也可能发生的。
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