product 作“商業(yè)產(chǎn)品總稱”解時，是不可數(shù)名詞；作“某事物的產(chǎn)物”解時，是可數(shù)名詞。
例句：
The product has filled a gap in the market.
這個產(chǎn)品填補了市場的空白。
This product has not been tested on animals.
這種產(chǎn)品尚未在動物身上試驗。