我们必须将此制度永久保持。
标注在再制造产品上的标志应能永久保持。
The mark indicated on the remanufactured products shall be everlasting.
朋友间做交易,应把合同写得清清楚楚并结清帐目,这样才能永久保持朋友的关系。
When a friend deals with a friend, let the bargain be clear and get the accounts square, that they may continue friends to the end.
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