英语：请发邮件告诉我客户说明ETA将拖迟到1月29号

Please send an e-mail to tell our clients that ETA will be delayed until January 29

请发邮件告诉我客户说明ETA将拖迟到1月29号
Please inform our client by e-mail to explain that the ETA would be delayed to Jan. 29.

Please send email to my client to inform that the ETA would be delayed till January 29.

Please inform our client by e-mail to explain that the ETA would be delayed to Jan. 29

这个翻译比较好些，其他2位我一看就知道是机器翻译的