| 单词 | automatic |
| 释义 | Word Frequency automatic(ˌɔːtəˈmætɪk) adjective 1. performed from force of habit or without conscious thought; lacking spontaneity; mechanical an automatic smile 2. a. (of a device, mechanism, etc) able to activate, move, or regulate itself b. (of an act or process) performed by such automatic equipment 3. (of the action of a muscle, gland, etc) involuntary or reflex 4. occurring as a necessary consequence promotion is automatic after a year 5. (of a firearm) a. utilizing some of the force of or gas from each explosion to eject the empty shell case, replace it with a new one, and fire continuously until release of the trigger Compare semiautomatic (sense 2)b. short for semiautomatic (sense 2), See also machine (sense 5) noun 6. an automatic firearm 7. a motor vehicle having automatic transmission 8. a machine that operates automatically Derived forms automatically (ˌautoˈmatically) adverb automaticity (ˌɔːtəʊməˈtɪsɪtɪ) noun Word origin C18: from Greek automatos acting independently |
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