environment是不可數名詞，是環境的意思。但如果有定語修飾則可以加a，如he was brought up in an unhappy home environment。
environment的用法
environment可以用作名詞
environment可指影響人們生活的各種抽象和具體的“狀況,環境”。the environment特指自然環境,其後的謂語動詞用單數形式。
environment用作名詞的用法例句
She is not used to the new environment.她對新環境不習慣。
We are required by environment protecting department to use anthracite.環保部門要求我們使用無煙煤。
At one time, children didn't have to learn any more than how to cope with their physical environment.曾經有壹段時間,兒童除了學習適應外界環境以外,什麽都不學。