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。

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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（slips of the tongue）、 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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They asked the public to alert them to other ailing manatees who may be showing a lack of coordination and stability in the water, muscle twitches or seizures, and difficulty lifting their heads to breathe.

CNN: Algae bloom kills record number of manatees

When injected in diluted form, Botox relaxes muscle movements that cause twitches and stuttering as well as those distressing wrinkles.

ECONOMIST: Beauty treatments