| 单词 | field emission |
| 例句 | He persuaded a U.K. company, York Probe Sources, to build a cheap field emission gun. ‘We need a people’s cryo-EM.’ Scientists hope to bring revolutionary microscope to the masses 2020-01-23T05:00:00Z The university says in a news release the field emission scanning electron microscope is primarily for research, but instructors also will use it in teaching laboratories. Marshall given science grant for sophisticated microscope 2018-10-15T04:00:00Z |
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