Dear xx,  Good day.   This is xx from xx .We are the supplier of xx. Glad to contact with you.  Enclosed is purchse order for your pany, please kindly check it.  Any questions please kindly contact with me. Thanks & Best Regards, XX 我天天写邮件给老外,一般都是这种格式,简洁明了。希望对您 有帮助,谢谢。 那有限公司的表达方式是 co.ltd.还是 co.,ltd.? Co.,Ltd 1,关于购置办公用品的请示 2,某某分局(或某某局长):  3,为保证某某工作的正常运行,确保某某工作( ),我部门现 需购买()()()()办公用品。当否,请批示。