But radioluminescence is rarely used nowadays because engineers are developing better photoluminescent compounds for watches as well.

但是现在很少使用辐射发光，因为工程师也在为手表开发更好的光致发光化合物。

Because you energise these toys with light, whether it's the sun or a lamp in your living room, we say that they're 'photoluminescent'.

因为你用光为这些玩具提供能量，无论是太阳还是客厅里的灯，我们都说它们是“光致发光的”。