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一、详细释义：
adj.
发光的，明亮的，清楚的
例句：
She was flushed like the dawn, with a kind of luminous rosiness all about her.
她满脸像朝霞一样的通红，浑身上下有一种玫瑰色的光彩。
例句：
The luminous dial on the clock showed five minutes to seven.
那只钟的夜光钟面显示时间为6点55分。
二、词义辨析：
bright,brilliant,glowing,radiant,luminous
这些形容词均含有“明亮的”之意。bright常用词，与昏暗相对应，侧重形容光线的强度，指一切自身发光明亮或反射光的事物。brilliant指非常亮或亮得引人注目，多含闪耀或反光闪烁之意。glowing指稳定光源发出的明亮持久的光，或燃烧最后阶段产生的红光。radiant侧重光线的射击，也可指像太阳或星星一样发光的东西。luminous着重指发出持续稳定的亮光；可指在黑暗中的发光物。
三、相关短语：
luminous energy
发光能量，光能
luminous flux
n.[物]光通量(其单位为流明lumen)
四、参考例句：
There are many luminous road signs along the roads.
沿着路有许多夜光路标。
The luminous dial on the clock showed five minutes to seven.
那只钟的夜光钟面显示时间为6点55分。
A light reflective foundation will minimize lines and give your skin a luminous quality.
清淡而带反射的粉底将淡化细纹，给你的肌肤以明亮的质感。
She was flushed like the dawn, with a kind of luminous rosiness all about her.
她满脸像朝霞一样的通红，浑身上下有一种玫瑰色的光彩。
The heavens were placid, but still luminous with the light at the retreating sun.
天空一片宁静，夕阳染得天际色彩斑斓。
Whether light comes from a luminous or a non-luminous object, it travels in straight lines.
不管是发光体还是非发光体发出的光都是以直线传播。
Fireflies are winged beetles and give off a green luminous glow from chemicals in their lower abdomen in a process called bioluminescence,
萤火虫是有翅膀的昆虫，会通过一种叫做生物体之发光的化学进程从腹部释放出一种绿色的夺目光芒。
The sci-fi style snack appears to be nothing more than a normal mint Cornetto however once under UV lighting the sweet treat lights up in luminous colours.
乍看之下，这种科幻风格的小吃似乎仅仅是一直普通的薄荷口味可爱多甜筒，但是，在紫外光的照耀下，这支甜点会发出亮闪闪的光芒。
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