外贸商业信函写作应把握三个原则：礼貌、简洁、明确。
Politeness, clearness and conciseness are the essentials of good business writing.
就像商业信函、大学报告与论文一样，音视频脚本的编写也要遵循一些写作准则与规范。
Just like business letters, college reports and essays, guidelines and rules govern the writing process.
写作技能对于撰写清晰、有说服力的电子邮件及其他形式的商业信函而言必不可少。
Writing skills are necessary for clear, persuasive email and other types of business correspondence.
写作技能对于撰写清晰、有说服力的电子邮件及其他形式的商业信函而言必不可少。
Writing skills are necessary for clear, persuasive email and other types of business correspondence.
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