heliograph

英[ˈhi:liəgrɑ:f]
美[ˈhiliəgræf]

基本释义

n.
照相制版,太阳摄影机,日光仪

词性变化

实用例句

The heliograph must thus be carefully aligned in the first instance.

回照器在开始时就要小心地对准.

辞典例句

英英释义

Noun
  • 1. an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

Verb
  • 1. signal by means of a mirror and the using the sun's rays

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行业英语