"Timely" means within the valid time of duty-free formalities of Party a's goods and the valid time for delivery according to the contract signed between Party a and its client.

“及时”是指在甲方货物免税手续有效期内或甲方与甲方客户签订合同的交货期限内。

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On the server end, check the MAC is valid and the time (received in plaintext) is within an acceptable window.

在服务器端，检查MAC的有效时间(接收明文)是一个可以接受的窗口内。

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Check-in procedure a passenger should arrive at the airport within the time limit set by the carrier and check in beforehand by showing his or her ticket and valid identity card.

乘机旅客必须在承运人规定的时限，凭客票及本人有效身份证办理乘机手续。

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