<補充>
an amount of +不可數名詞 : 若干/一些
EX : A small amount of pepper needs to be added to spice up the dish. 這道菜必須加入一些胡椒來增添風味。
a number of +可數名詞 : 若干/一些
EX : A number of people were killed in the fire. 有一些人在這場火災中喪生。
FROM :雜誌
35. When it comes to publicizing their c..-阿摩線上測驗