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| undeliverable (Not able to be delivered to an intended recipient. If an e-mail message is undeliverable, it is returned to the sender with information added by the mail server explaining the problem; for example, the e-mail address may be incorrect, or the recipient's mailbox may be full) | |||
| onbestelbaar: 1 短语, 1 学科 |
| 一般 | 1 |