Content 還是 contents 呢？

Content 主要當名詞和形容詞用，用作名詞時有攸關對錯的單複數之分，即 content 和 contents，因為兩者的意思和用法皆不同，使用時不可不慎。單數的 content 是個不可數名詞，意為「(文章、電影、電視節目、演講等的) 內容)；(網站、光碟、隨身碟等的) 內容」。例如：

This film’s adult content is not suitable for young children. (這部電影的成人內容對兒童不宜) (正)
This film’s adult contents are not suitable for young children. (誤)
Several well-known websites have closed down because of the high cost of producing original content. (數個知名網站因製作原創內容的成本過高而關門大吉了) (正)
Several well-known websites have closed down because of the high cost of producing original contents. (誤)

除上述意思外，單數的 content 還意為「(物質) 含量」，但這個 content 卻是可數名詞，只是要用單數，沒有複數型。例如：

Chocolate has a high fat content; it’s not good for your health. (巧克力的脂肪含量很高，對你的健康無益) (正)
Chocolate has high fat contents; it’s not good for your health. (誤)
John usually eats a breakfast cereal with a high sugar content. (約翰經常吃含糖量很高的早餐麥片) (正)
John usually eats a breakfast cereal with high sugar contents. (誤)
The vitamin and mineral content of fruit and vegetables is high. (蔬果的維生素和礦物質含量很高) (正)
The vitamin and mineral contents of fruit and vegetables are high. (誤)

複數型 contents 意為「(書籍或雜誌的) 目錄；(書籍、雜誌、信件、文件等的) 內容；所容納的東西，內容物」。例如：

I can’t find the chapter on K-pop in the contents. (我在目錄中找不到探討韓國流行音樂的那一章) (正)
I can’t find the chapter on K-pop in the content. (誤)
The contents of the document need to be revised substantially. (這份文件的內容需要大幅修訂) (正)
The content of the document needs to be revised substantially. (誤)
The contents of the letter remain secret. (這封信的內容仍然保密) (正)
The content of the letter remains secret. (誤)
Peter sold the apartment and its contents. (彼得把公寓和裡面的東西都賣了) (正)
Peter sold the apartment and its content. (誤)
The contents of her handbag spilled all over the floor. (她手提包裡的東西掉了一地) (正)
The content of her handbag spilled all over the floor. (誤)

Content 亦可當形容詞用，意為「滿足的；滿意的」，但不可放在名詞之前修飾名詞，只能放在 BE 動詞及其他連綴動詞之後，其後通常接介系詞 with 或不定詞。例如：