棉花
mián hua
cotton
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我失眠了，很难受。
wǒ shī mián le， hěn nán shòu。
I couldn't sleep and felt very uncomfortable.
我至少需要七个小时的睡眠。
wǒ zhì shǎo xū yào qī gè xiǎo shí de shuì mián。
I need at least seven hours of sleep.