She was wearing a black velvet number.

她穿着一件时髦的黑天鹅绒礼服。

《牛津词典》

A typical work, such as Seven Days, consists of a single beautiful black-and-white photograph taken on an epic walk, with the mileage and number of days taken listed beneath.

一个典型的作品，比如《七天》，由一张美丽的黑白照片组成，它是在一次史诗般的步行中拍摄，拍摄的里程数和天数就列在下面。

youdao

These are colored either black or white to show the number zero to nine.

它们被涂上黑色或白色来表示数字0到9。

youdao

It helped him gain a huge number of white fans as well as black ones.

VOA: special.2010.05.16

If you move northwards along the Black Sea and southwards as well, Greek cities, not in the same number, they're fewer than they are in the places I've mentioned so far, but important ones.

倘若沿着黑海北上或者南下,也会看见希腊城市,但为数不多,比我目前所提到的所有地区都要少,但它们却非常重要

耶鲁公开课 - 古希腊历史简介课程节选

Amy Poehler chose a glitzy Stella McCartney halter neck black number.

FORBES: Heidi Klum, Nicole Kidman, Sofia Vergara Sizzle On The Emmy Awards Red Carpet

Carrie Underworld channeled her inner princess in an Oscar de la Renta ballgown and Julie Bowen of Modern Family wore a chic black number from Doo.

FORBES: Miley Cyrus Vamps It Up And Katy Perry Dazzles At Billboard Music Awards

The All Black number 10 limped off the field in the 27th minute and Crusaders captain Reuben Thorne said he was unlikely to be fit for the Albany match.

BBC: Andrew Mehrtens