太阳是发光体。

The sun gives light.

鬼火是一种夜间出现在沼泽里或沼泽上的发光体。

Ignis fatuus is a luminosity that appears over swamps or marshes at night.

光源，发光体：光的来源，特指灯、灯笼或某种带电发光装置。

A source of light, especially a lamp, a lantern, or an electric lighting fixture.

这家伙最冷血或者最奇特的地方在于，它可以用它“手臂”上所谓的发光体来蛊惑猎物。

But by far, the coolest/weirdest thing about this sea creature is its ability to hypnotize its prey using what's knowns as "photophores" on its arms.

这些“树”形的家具可以坐、可以遮阴、可以吸声，夜晚还可以做为发光体透出白色或者蓝色的光。

These 'trees' provide seating, shade and acoustic absorption and at night they serve as an illuminate bodies which fill the room with white or blue glowing light.