Picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources .
从外陆来源的无线电频率范围内接受电磁射线。
Most metallic and some nonmetallic elements will emit characteristic radiations .
大多数金属和某些非金属元素都会发出特有的射线。
The capacity of eclipse glasses to block harmful radiations from the sun reduces with time .
日食专用眼镜对于有害辐射的阻挡效力是随着时间慢慢减弱的。
Originations , radiations and biodiversity changes .
生物的起源、辐射与多样性演变。
Ionising radiations or contaminations by radioactivity from any nuclear fuel or from any nuclear waste from the combustion of nuclear fuel .
离子辐射、核子燃料或核子燃料燃烧所生废弃物之辐射污染。
Research on biological damages caused by various ionizing radiations is the frontier area of radiobiology and radiology . It is also the hot spot included in recent public focus .