记忆方法
1、拉丁 vacuus 意为"空的"——真空就是"什么都没有的空间"，vacuum cleaner 是"吸尘器"，把空气都抽走。
2、同族 vain（徒劳、空空如也）、vacant（空着的、空缺的）都出自这条 vac-"空"根。in a vacuum 处于真空中，字面和比喻都能用。
3、重音在前 vac-，读 VAK-yoom；a 是短音 /æ/（cat 里那种），c 发硬音 /k/，-uum 读长音 /uːm/（像 room 那样收 m）。拼写 v-a-c-u-u-m 六个字母，两个 u 连着写；别写成 vacum（少一个 u）。
2、同族 vain（徒劳、空空如也）、vacant（空着的、空缺的）都出自这条 vac-"空"根。in a vacuum 处于真空中，字面和比喻都能用。
3、重音在前 vac-，读 VAK-yoom；a 是短音 /æ/（cat 里那种），c 发硬音 /k/，-uum 读长音 /uːm/（像 room 那样收 m）。拼写 v-a-c-u-u-m 六个字母，两个 u 连着写；别写成 vacum（少一个 u）。
机器生成的内容难免有错，看到不靠谱的拆解请告诉我们
词族 · vacuum
中文词源
vacuum 真空
词源同vacant,空着的，用于指真空。
英语词源
- vacuum (v.)
- "to clean with a vacuum cleaner," 1919, from vacuum (n.). Related: Vacuumed; vacuuming.
- vacuum (n.)
- 1540s, "emptiness of space," from Latin vacuum "an empty space, vacant place, a void," noun use of neuter of vacuus "empty, unoccupied, devoid of," figuratively "free, unoccupied," related to vacare "be empty" (see vain). Properly a loan-translation of Greek kenon, literally "that which is empty." Meaning "a space emptied of air" is attested from 1650s. Vacuum tube "glass thermionic device" is attested from 1859. Vacuum cleaner is from 1903; shortened form vacuum (n.) first recorded 1910.
The metaphysicians of Elea, Parmenides and Melissus, started the notion that a vacuum was impossible, and this became a favorite doctrine with Aristotle. All the scholastics upheld the maxim that "nature abhors a vacuum." [Century Dictionary]
权威例句
- 1. The Marshal stepped over the vacuum-cleaner and stumped out of the room.
- 元帅迈过真空吸尘器，脚步沉重地走出了房间。
- 2. Vacuum-packed ham slices should be unwrapped 30 minutes before serving.
- 真空包装的火腿片应在食用前30分钟把包装除去。
- 3. The collapse of the army left a vacuum in the area.
- 这支军队的溃败使这个地区出现了军事真空。
- 4. He could hear the whirr of a vacuum cleaner.
- 他能听到真空吸尘器的嗡嗡声。
- 5. We lived in a vacuum — no life, no news, no books.
- 我们生活在与世隔绝的环境里——没有其他生物，收不到外界消息，也没有书看。