they must be cold
它们一定很冷
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"They must be cold without any clothes," said his wife.
“没有衣服，他们一定很冷。”他的妻子说。
youdao
" She said, "They must be cold and scared, deep underwater.
孩子们在水下一定非常寒冷和害怕。
And they must be able to recognize your voice even when you have a head cold.
他们必须能够认识你的声音，即使你有一头冷。
Each year, many vaccines must be destroyed because they became too warm or too cold.
VOA: special.2010.02.24
Their bodies are unable to self-regulate their core body temperature and we must be vigilant they are not too cold or too hot.
CNN: Genetic disease: Mother hopes for cure for dying children
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