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

复数:heliographs;

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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