under separate cover

基本解释

In order to promote business between us, we are airmailing you samples, under separate cover, for your inspection.
为促进双方业务往来，另封航邮寄上样品，供你参考。
To give you a general idea of our products, we are sending you under separate cover a catalogue together with a range of pamphlets for your reference.
为使贵方对我方产品有全面的了解，我方另函寄去一本目录册及一套小册子，供参考。
To give you some ideas of various types of bicycles we are dealing in, we are pleased to send you , under separate cover , by air-mail our latest catalogue and a price list.
为使你方了解我方经营的各种自行车，我们很高兴令封航邮寄我们的最新产品目录与价格单一份。

Under separate cover, Arianda sent her own letter, with a drawing of the American and the Ukrainian flags.
NEWYORKER: The Natural