The reason, severe insomnia, Why Is the sky?

究其原因，严重失眠究竟缘何而起？

youdao

Jackson was known to have suffered from severe insomnia.

众所周知，杰克逊一直患有严重失眠。

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Man, I've been suffering from severe insomnia. I've been awake for 3 days now.

哎！我患了严重的失眠症。我已经三天没睡了。

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Patients with Morvan's syndrome suffer from severe insomnia and have been known to go for months without sleeping.

ECONOMIST: Memory formation

The SEC and the Justice Department said the men traded shares dating back to 2006 of companies whose drugs were used for colon cancer, schizophrenia, insomnia, severe constipation, osteoarthritis and heart disease.

WSJ: FDA Chemist Charged With Insider Trading