她被告知这种药可能导致光敏性，所以外出时需要涂防晒霜。

She was told the medication might cause ___photosensitivity, so she needs to wear sunscreen when going outside.

这个太阳能电池板的光敏性很高，即使在阴天也能高效工作。

The solar panel has excellent ___photosensitivity, enabling efficient operation even on cloudy days.