[ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]不显著的;不容易被注意到的;不引人注目的 If you describe something or someone as unobtrusive, you mean that they are not easily noticed or do not draw attention to themselves.
[FORMAL 正式]
The coffee-table is glass, to be as unobtrusive as possible...
那张咖啡桌是玻璃的,为的是尽量不惹眼。
He managed the factory with unobtrusive efficiency.
他经营那家工厂很有效率却不事张扬。
unobtrusively
They slipped away unobtrusively...
他们趁人不注意溜走了。
Unobtrusively, the other actors filed into the lounge.
其他演员不声不响地鱼贯进入休息室。
Oxford
un·ob·tru·sive/ˌʌnəbˈtruːsɪv; NAmEˌʌnəbˈtruːsɪv/adjective( formal,often approving) not attracting unnecessary attention 不张扬的;不招摇的◆The service at the hotel is efficient and unobtrusive.那旅馆的服务既有效率,又沉稳低调。OPP
obtrusive
▶un·ob·tru·sive·ly/ˌʌnəbˈtruːsɪvli; NAmEˌʌnəbˈtruːsɪvli/adverb◆Dora slipped unobtrusively in through the back door.多拉悄悄地从后门溜了进去。un·ob·tru·sive/ˌʌnəbˈtruːsɪv; NAmEˌʌnəbˈtruːsɪv/un·ob·tru·sive·ly/ˌʌnəbˈtruːsɪvli; NAmEˌʌnəbˈtruːsɪvli/