这个词用在哪些类型的语言当中：信件还是报告，口头还是书面，生物还是商务？ 等等。

Which types of language is the word used in: letters or reports, spoken or written, biology or business etc?

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苹果公司拒绝回应工人信件并且要求一位记者撤回供应商报告。

Apple declined to comment on the workers' letter and referred a reporter back to its supplier report.

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“我过去曾收到一些父母在阅读研究报告后发来的恐吓信件，但常常发现，也有很多父母觉得研究让他们恍然大悟，”她说。

"I've received hate mail in the past from some parents after they've read about the studies, but often find that many parents feel liberated by the research," she said.

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