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