Each guest has her own single room, or shares, on request, a double room.

每位客人都有自己的单人房间，经要求也可共用双人间。

《柯林斯英汉双解大词典》

Details are available on request.

详情备索。

《柯林斯英汉双解大词典》

Catalogues are available on request.

有目录备索。

《牛津词典》

The request is based on a law from eighteen fifty-one.

VOA: special.2010.06.04

Thai diplomats on Wednesday morning presented Cambodian officials with a request to detain and extradite Thaksin Shinawatra.

VOA: standard.2009.11.11

The strategy review is expected to be completed in the coming weeks, and to be followed by a decision on General McChrystal's troop request.

VOA: standard.2009.09.25

The distances between stops are prodigious and, because of that, the train halts almost anywhere on request.

BBC: The wonders of Canada by rail

The helpful, solicitous staff happily stows skis in a storage area and presents them efficiently on request.

FORBES: To Ski Or Not To Ski

The SEC will provide the trade failure data, but only on request and only after a two month lag.

FORBES: Beating Fails