Definition: a computer file that is sent together with an e-mail message Level: B2
重要文件请查看附件。
Please see the important document in the ___attachment.
我打不开你发送的邮件附件。
I couldn't open the email ___attachment you sent.
请确保附件文件的大小不要太大。
Make sure the ___attachment file size is not too large.
