sealed copy

基本解釋

This class has to be sealed since the build engine instantiates its own copy of this type.
由于生成引擎會實例化自己的這種副本，因此必須密封此類。
Bidder should provide the printed version of various valid qualification certificates, such as business license and operation license, etc (The copy must be signed or sealed by the bidder).
投標人須提供各種（合格有效的）資質(zhì)證書的復印件：如營業(yè)執(zhí)照、經(jīng)營許可證等；
A copy of certified transcript in a sealed envelope by the university the applicant graduated from or studied at;
由畢業(yè)或肄業(yè)之大學密封的學業(yè)成績表一份；