So easy,just give some examples!!!

Army: An army of soldiers(一支軍隊,包括了上尉,士兵,統帥等)
Bunch: A bunch of flowers(一束鮮花,可能有多種的襯花)
Suit: A suit of clothes(一套衣服,即包括了襯衣,裙子/褲子,領呔等)
Flock: A flock of birds(一群鳥,不同種類的鳥)


A business of flies
A class of students
A clowder of cats
A clutch of chicks
A clutch of eggs
A grove of trees
A hamper of helpers
A hand of bananas
A heap of trash
A heard of blind people
A herd of elephants
A herd of horses
A hive of bees
A host of angels
A huddle of lawyers
A huddle of players
An incantation of witches
A kettle of drums
A kindle of kittens


Also, this website provides tons of collective nouns... check it out!
http://www.annexed.net/bthree/nouns.html

a bunch of flowers 一束花
a gang of wolves 一群野狼
a group of dinner guests 一群晚宴的來賓
a school of whales 一群鯨魚
a line of stones 一排石頭
a team of enginessrs 一組工程人員

a bundle of flowers
a basket of eggs

2006-11-20 22:14:16 補充：
a pair of shoes/ socks