twins, triplets, quadruplets. 雙胞胎, 三胞胎, 四胞胎

Fourteen-week-old twin polar bear cubs 

Fourteen-week-old twin polar bear cubs play during their first presentation to the media in Hellabrunn Zoo in Munich, Germany on March 19, 2014. The male and female twins were born in the zoo on December 9, 2013. By Alexandra Beier/Getty Images.
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Face Of The Day « The Dish
http://dish.andrewsullivan.com/2014/03/19/face-of-the-day-423/

Two 14-week old polar bear twins

Two 14-week old polar bear twins explore their enclosure at the Hellabrunn zoo in Munich, Germany, Wednesday, March 19, 2014. The cubs who were born on Dec. 9, 2013 were presented to the public for the first time. (AP Photo/dpa, Sven Hoppe)
Sven Hoppe
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Baby zoo animals, March 2014
http://www.statesman.com/gallery/entertainment/baby-zoo-animals-2013/g8qL/

One of the Amur tiger twin cubs

Jens Meyer/AP Photo
One of the Amur tiger twin cubs plays with the mother Tiga in the zoo in Gotha, Germany, June 22, 2014. The two Amur tiger babies were born, April 13, 2014.
Baby Tiger Plays With Mom Picture | Cutest Baby Animals from Around the World - ABC News
http://abcnews.go.com/Lifestyle/Pets/photos/baby-animals-3351912/image-baby-tiger-plays-mom-24276617

Twins, Triplets. 雙胞胎, 三胞胎

An exhibition from photographer Martin Schoeller examines the visual nuances of twins and triplets.
Jonas, Moses and Noah | Identicals: Portraits of twins - Yahoo News  http://news.yahoo.com/lightbox/identicals-portraits-of-twins-1369864367-slideshow/jonas-moses-and-noah-photo--229955201.html
Yahoo News Photos  http://yahoonewsphotos.tumblr.com/

panda triplets

ChinaFotoPress/Getty Images

Cute, Cuter and Cutest Triplet Pandas at Play
The world's only live panda triplets play together at Chimelong Safari Park on Dec. 9, 2014 in Foshan, China.

panda triplets

ChinaFotoPress/Getty Images
Lovable Panda Triplets Get Named
A naming event for panda triplets is held on Oct. 1, 2014 in Guangzhou, China. Over 710,000 replies were collected for the panda triplets during the naming event.
Lovable Panda Triplets Get Named Picture | Cutest Baby Animals from Around the World - ABC News
http://abcnews.go.com/Lifestyle/Pets/photos/baby-animals-3351912/image-lovable-panda-triplets-named-25896022

Three of the newly born cheetah quadruplets

Petr David Josek/AP Photo
Three of the newly born cheetah quadruplets rest at their enclosure in Prague's zoo, Czech Republic, Dec. 19, 2014.
3 Cheetah Cubs Hang Out at the Zoo Picture | Cutest Baby Animals from Around the World - ABC News
http://abcnews.go.com/Lifestyle/Pets/photos/baby-animals-3351912/image-cheetah-cubs-hang-prague-zoo-27718442

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