heliographs的读音 heliographs中文意思
读音
n. 照相制版，太阳摄影机，日光仪( heliograph的名词复数 )heliographs 用法和例句
- More recently , so-called " heliographs " have been used to relay military signals in a similar way .
- 在近代，所谓的“日光仪”也是利用同样的方式来传递军事信号。