A heliograph is a signalling device that uses reflected sunlight. 日光仪是一种通过反射阳光来工作的信号装置。
Like insects, reptiles are essentially heliothermic (their bodies get their warmth from the sun). 和昆虫一样,爬行动物本质上也是日温动物(它们的身体从太阳获得温暖)。
See also: heliocentricheliotherapy