heliograph
英['hiːliəɡrɑːf]
美['hiːliəɡræf]
- v. 照相制版；太阳摄影机；日光仪
详细释义
Noun:
-
an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
-
signal by means of a mirror and the using the sun's rays
双语例句
- 1. 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.
来自辞典例句
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