umbrella [ʌmˈbrelə]
n. 雨伞
例句1, Don’t forget to bring your umbrella; it looks like it’s going to rain.
别忘了带雨伞；看起来要下雨了。
例句2, She opened her colorful umbrella to shield herself from the sun.
她打开了她的彩色雨伞，遮挡阳光。
例句3, The umbrella organization coordinates the activities of various smaller groups.
这个伞形组织协调各个小团体的活动。
例句4, Under the umbrella of the new policy, many businesses have flourished.
在新政策的保护下，许多企业蓬勃发展。

U.N./ UN(缩) = the United Nations [juː ˈən]
n. 联合国
例句1, The United Nations plays a crucial role in maintaining global peace and security.
联合国在维护全球和平与安全方面发挥着至关重要的作用。
例句2, Many countries work together under the United Nations to address climate change.
许多国家在联合国的框架下合作应对气候变化。
例句3, The United Nations provides humanitarian aid to countries in need.
联合国向有需要的国家提供人道主义援助。
例句4, The United Nations aims to promote sustainable development worldwide.
联合国的目标是促进全球的可持续发展。
例句5, The United Nations has 193 member states, each with equal representation.
联合国有193个成员国，每个成员国都有平等的代表权。

uncle [ˈʌŋk(ə)l]
n. 叔,伯,舅,姑夫,姨父
例句1, My uncle always tells fascinating stories about his travels around the world.
我的叔叔总是讲述他环游世界的精彩故事。
例句2, During the family reunion, my uncle brought a delicious homemade pie.
在家庭聚会上，我的舅舅带来了一份美味的自制派。
例句3, My uncle, who is a professor, gave me some great advice on choosing a college.
我的姑父是一名教授，他在选择大学方面给了我一些很好的建议。
例句4, Every summer, my uncle takes us fishing at the lake.
每年夏天，我的姨父都会带我们去湖边钓鱼。
例句5, My uncle’s old watch has been passed down through generations in our family.
我伯伯的旧手表已经在我们家族中传承了好几代。

under [ˈʌndə®]
ad.& prep. 在…下面，向…下面
例句1, The cat is hiding under the table.
猫正躲在桌子下面。
例句2, She placed the book under the pillow.
她把书放在了枕头下面。
例句3, The children played under the tree.
孩子们在树下玩耍。
例句4, He found his keys under the sofa.
他在沙发下面找到了他的钥匙。
例句5, The river flows under the bridge.
河水从桥下流过。

underground [ʌndəˈɡraʊnd]
a. 地下的 n. 地铁
例句1, The underground passage led us safely to the other side of the busy street.
地下通道安全地将我们带到了繁忙街道的另一边。
例句2, She takes the underground to work every morning to avoid traffic jams.
她每天早上乘地铁上班，以避免交通堵塞。

understand (understood, understood) [ʌndəˈstænd]
v. 懂得;明白;理解
例句1, I finally understood the teacher’s explanation after she drew a diagram on the board.
老师在黑板上画了一个图后，我终于明白了她的解释。
例句2, She understood the importance of hard work from a very young age.
她从很小的时候就懂得了努力的重要性。
例句3, Do you understand what I’m trying to say?
你明白我在说什么吗？
例句4, He understood the instructions clearly and completed the task without any mistakes.
他清楚地理解了指示，并且毫无错误地完成了任务。
例句5, We understood each other’s feelings without saying a word.
我们无需言语就理解了彼此的感受。

understanding [ʌndəˈstændɪŋ]
n. 领会;理解
例句1, Her understanding of the subject made the lecture much easier to follow.
她对这门学科的理解使讲座更容易跟上。
例句2, A good understanding between friends is essential for a lasting relationship.
朋友之间的良好理解对于持久的关系至关重要。
例句3, The teacher’s understanding of the students’ needs helped them succeed.
老师对学生需求的理解帮助他们取得了成功。
例句4, With a deep

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