a hypothetical object capable of absorbing all the electromagnetic radiation falling on it;
"a black body maintained at a constant temperature is a full radiator at that temperature because the radiation reaching and leaving it must be in equilibrium"
双语例句
The words in this book are in black print. 本书的词印的是黑体字。
A bold black headline screamed out from the front page. 在头版上出现了一条令人触目惊心的粗黑体大字标题。