1. dusk [dʌsk]
n. 黄昏时分，日暮，天色昏暗的时刻
the period of time just before nightfall when it is still light but not fully dark
例句：
1. The park shuts its gates at dusk. 公园在黄昏时分关闭大门。
2. At dusk, a large number of bats emerge from their hiding places. 傍晚时分，众多蝙蝠从藏身之处飞出。
2. rehearse [rɪˈhɜ:s]
vt. 排演，预演，反复练习，背诵；vi. 进行排练，练习，演习
to practice a play, a musical piece, etc., in preparation for a public performance
例句：
1. We have the space available for rehearsing our play. 我们有空间可以进行戏剧排练。
2. We barely have the opportunity to rehearse. 我们几乎没有什么机会进行排练。
3. landlord [ˈlændlɔ:d]
n. 地主，房东，旅店老板
a person or entity that owns a property or land and collects rent from tenants
例句：
1. He is the landlord of this establishment. 他是这家酒店的房东。
2. He used to work as a long-term laborer for a landlord. 他曾经为地主长期打工。
4. paw [pɔ:]
n. 动物的爪子，手掌；vi. 用蹄扒地，翻找；vt. 抓，扒，亲昵地抚摸
the foot of an animal equipped with claws or nails, such as a cat, dog, or bear
例句：
1. He served as a cat’s paw in the scheme. 他在这个阴谋中充当了爪牙。
2. Avoid pawing at every object you encounter. 不要见到什么就摸什么。
5. protest [ˈprəʊtest]
vt.&vi. 抗议，反对；声明；n. 抗议，声明
a vocal or written expression of disagreement, disapproval, or opposition
例句：
1. I cannot remain silent on this matter without making a protest. 我不能对此事保持沉默，必须提出抗议。
2. We interpreted his silence as a form of protest. 我们将他的沉默解读为一种抗议。
6. stir [stɜ:(r)]
n. 激动，骚动，搅拌；vt. 激起，引起，搅和；vi. 移动，活动，离开，搅拌，激动
to mix a liquid or substance by moving a utensil in a circular motion
例句：
1. Stir the soup gently. 轻轻搅拌一下汤。
2. Do not stir up conflict between them. 不要在他们之间挑起纷争。
7. creep [kri:p]
vi. 爬行，匍匐前进；蹑手蹑脚地走，缓慢移动
to move slowly and cautiously, often to avoid detection
例句：
1. The infant is still learning to creep. 这个婴儿还在学习爬行。
2. I prefer not to creep along the shoreline. 我不愿意沿着海岸爬行。
8. classify [ˈklæsɪfaɪ]
vt. 分类，分级；列为
to organize items into categories based on their characteristics
例句：
1. Postal workers sort mail by destination in the post office. 邮局工作人员按寄送目的地分类邮件。
2. He meticulously classified the outcomes of his experiments. 他仔细地对他的实验结果进行分类。
9. circular [ˈsɜ:kjələ(r)]
adj. 圆形的，环形的；循环的；n. 传单，公告
having a shape like a circle
例句：
1. The clever boy transformed it into a circular design. 这个聪明的男孩把它改造成了圆形设计。
2. The lamp is mounted on a circular stand. 这盏台灯安装在一个圆形底座上。
10. enclose [ɪnˈkləʊz]
vt. 围住，包围；装入信封，附上
to surround
例句：
1. I will include his letter with mine when sending it. 我将把他的信随我的信一起寄出。
2. I have enclosed two tickets with this letter. 我随信附上了两张票。
11. flourish [ˈflʌrɪʃ]
vi. 繁荣，兴旺；vt. 挥舞（以吸引注意）；n. 繁荣，茂盛，挥舞，炫耀，装饰
to grow or develop successfully
例句：
1. When the roots are strong, the branches flourish. 根深则叶茂。
2. She rode past with a flourish of her riding crop. 她挥动鞭子骑马而过。
12. patch [pætʃ]
n. 补丁，斑，小块地；vt. 修补；vi. 打补丁
a small area that differs from the surrounding area in some way
例句：
1. This patch seems somewhat unprofessional. 这块补丁看起来有些业余。
2. We managed to patch up our differences. 我们设法和解了。
13. transmit [trænsˈmɪt]
vt. 播送，发射；传送，传递，传播
to broadcast something, or to send out or carry signals using radio, television, etc.
例句：
1. A telegraph is the fastest method to transmit the message. 打电报是传递这个信息最快的办法。
2. These symbols convey a message in a straightforward manner. 这些符号以最直接的方式传达信息。
14. lag [læg]
vi. 落后，步伐缓慢；n. 滞后，时间间隔
to move or make progress at a slower pace than others
例句：
1. After ten minutes, some runners in the race began to lag behind. 十分钟后，比赛中的有些选手开始落后。
2. There is approximately a fifteen-year time lag. 时间上大约有15年的滞后。
15. diameter [daɪˈæmɪtə(r)]
n. 直径
(the length of) a straight line that extends from one point on the edge of a circular shape or object, through its center, to the opposite edge
例句：
1. The circle has a diameter of six inches. 这个圆的直径是六英寸。
2. A diameter intersects the center of a circle. 直径穿过圆心。
16. organism [ˈɔ:gənɪzəm]
n. 生物，有机体，生物体
a single living entity, such as a plant, animal, or virus
例句：
1. The economy is not a mechanical system but a living organism. 经济不是一套机械系统，而是一个活的有机体。
2. Natural selection will eliminate such organisms. 自然选择将淘汰这些物种。
17. electron [ɪˈlektrɒn]
n. 电子
a minuscule particle of matter with a negative electric charge
例句：
1. We have arranged to position an electron on the stage of our microscope. 我们设法将一个电子置于显微镜的平台上。
2. If the energy is adequate, this electron will be released. 如果能量足够，这个电子将被释放出来。
18. excursion [ɪkˈskɜ:ʃn]
n. 远足，短途旅行
a brief journey typically taken for enjoyment, often by a group
例句：
1. I have coordinated with my classmates for an excursion to the beach. 我已经和同学们商讨了去海滩远足的事情。
2. Our class is planning an excursion to the coast. 我们班计划去海边进行短途旅行。
19. bullet [ˈbʊlɪt]
n. 枪弹，子弹
a small, metallic object fired from a firearm
例句：
1. The bullet wound on his shoulder was treated by making an incision. 他肩上的枪伤通过切开伤口进行治疗。
2. The bullet narrowly missed me. 那颗子弹差一点击中我。
20. father-in-law [‘fɑ:ðə(r) ɪn lɔ:]
n. 岳父，公公
the father of one’s spouse
例句：
1. He encountered his future father-in-law during his stay in Boston. 他在波士顿的逗留期间遇到了他未来的岳父。
2. His father-in-law works as a plantation manager. 他岳父是一名种植园经理。