a vote sent by post, rather than a vote by a person physically attending a polling station, meeting, etc.

Whether he wins will be decided by counting postal votes in the next few days. 他是否获胜还要看接下来几天里邮寄选票的统计结果。

Convicts cannot vote, while unconvicted (remand) prisoners can use a postal vote. 定罪者没有选举权，而未定罪的（在押）囚犯可以通过邮寄投票。

a system of voting in which people send their votes by post , rather than voting in person at a polling station

The first host, to be selected next year by postal vote, may be a city like 1980 Olympic host Moscow. 明年通过邮寄投票选出的第一个东道主可能是像1980年奥运会东道主莫斯科这样的城市。

Following the inquiry there would be a postal vote by individual members for guidance on future policy. 调查结束后，各成员将进行邮寄投票，以商定未来的政策。