oasis [‘əueisis]
n. 绿洲,舒适的地方
例句1, After days of trekking through the desert, the sight of the lush oasis filled us with relief and joy.
在沙漠中跋涉了数天后，看到那片郁郁葱葱的绿洲让我们充满了宽慰和喜悦。
例句2, The cozy café became an oasis for the weary travelers, offering warmth and comfort amidst the bustling city.
那家舒适的咖啡馆成了疲惫旅客的绿洲，在喧嚣的城市中提供了温暖与舒适。

obliging [ə’blaidʒiŋ]
a. 亲切的,体贴的,殷勤的,有礼貌的
例句1, The obliging hotel staff went out of their way to ensure our stay was comfortable and memorable.
这家酒店的员工非常亲切，他们竭尽全力确保我们的住宿舒适而难忘。
例句2, Her obliging nature made her the go-to person for help among her colleagues.
她体贴的性格使她成为同事中寻求帮助的首选。
例句3, The obliging waiter not only recommended the best dishes but also offered to take our photo.
这位殷勤的服务员不仅推荐了最好的菜肴，还主动提出为我们拍照。
例句4, His obliging demeanor during the meeting impressed everyone with his politeness and professionalism.
他在会议上有礼貌的举止给所有人留下了深刻印象，展现了他的礼貌和专业精神。

oblivion [ə’bliviən]
n. 遗忘,忘却,赦免,大赦,湮没
例句1, The ancient civilization was lost in the mists of oblivion, leaving behind only fragments of its once-glorious past.
这个古老的文明湮没在历史的迷雾中，只留下了它曾经辉煌的片段。
例句2, After the traumatic event, she sought oblivion in the comforting embrace of sleep.
在经历了那场创伤性事件后，她在睡眠的安慰中寻求忘却。
例句3, The king granted oblivion to the rebels, pardoning them for their past crimes.
国王赦免了叛乱者，宽恕了他们过去的罪行。
例句4, The new law brought about a general oblivion for minor offenses, allowing many to start afresh.
新法律带来了对轻微罪行的大赦，让许多人得以重新开始。
例句5, In the vast ocean of time, even the greatest achievements can fall into oblivion.
在时间的浩瀚海洋中，即使是最伟大的成就也可能被遗忘。

oblivious [ə’bliviəs]
a. 遗忘的
例句1, Despite the loud noise outside, he remained oblivious to the commotion, deeply engrossed in his book.
尽管外面噪音很大，他仍然对骚动浑然不觉，全神贯注地读着书。
例句2, She was oblivious to the fact that her actions had caused such a stir among her colleagues.
她对自己的行为在同事中引起的骚动浑然不觉。

observance [əb’zə:vəns]
n. 遵守,仪式,惯例
例句1, The observance of traffic laws is crucial for ensuring road safety.
遵守交通法规对于确保道路安全至关重要。
例句2, The annual observance of the holiday includes traditional ceremonies and feasts.
这个节日的年度庆祝活动包括传统仪式和盛宴。
例句3, In many cultures, the observance of certain rituals is believed to bring good fortune.
在许多文化中，遵守某些仪式被认为能带来好运。

obsolete [‘ɔbsəli:t]
a. 荒废的,成废物的,陈旧的n. 废词,陈腐的人,废物
例句1, The obsolete machinery in the factory was replaced with modern equipment to increase productivity.
工厂里的陈旧机器被现代化设备取代，以提高生产效率。
例句2, Many words in Old English have become obsolete and are no longer used in modern language.
许多古英语词汇已经过时，不再在现代语言中使用。
例句3, He was considered an obsolete figure in the political arena, clinging to outdated ideas.
他被认为是政治舞台上的陈腐人物，固守着过时的观念。
例句4, The obsolete technology was discarded and replaced with more efficient systems.
废弃的技术被丢弃，取而代之的是更高效的系统。

obstinate [‘ɔbstinit]
a. 倔强的,顽固的
例句1, Despite numerous attempts to persuade him, John remained obstinate in his decision to quit his job.
尽管多次尝试说服他，约翰仍然固执地坚持辞职的决定。
例句2, The obstinate child refused to eat his vegetables, no matter how much his parents coaxed him.
那个倔强的孩子无论如何都不肯吃蔬菜，无论父母怎么哄他。
例句3, Her obstinate refusal to accept help only made the situation worse.
她顽固地拒绝接受帮助，反而使情况变得更糟。
例句4, The obstinate old man insisted on walking to the store despite the heavy rain.
尽管下着大雨，那个固执的老人还是坚持步行去商店。
例句5, His obstinate belief in his own infallibility often led to conflicts with his colleagues.
他固执地认为自己永远不会犯错，这常常导致他与同事发生冲突。

oceanographer [`əuʃə’nɔgrəfə]
n. 海洋学者
例句1, The oceanographer spent months at sea studying the impact of climate change on marine ecosystems.
这位海洋学者花了数月时间在海上研究气候变化对海洋生态系统的影响。
例句2, As an oceanographer, she specializes in mapping the ocean floor to understand its geological features.
作为一名海洋学者，她专门研究海底地图以了解其地质特征。
例句3, The oceanographer’s research revealed new insights into the behavior of deep-sea creatures.
这位海洋学者的研究揭示了深海生物行为的新见解。
例句4, Collaborating with other scientists, the oceanographer developed a model to predict ocean currents more accurately.
与其他科学家合作，这位海洋学者

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