这个项目吸引了从初学者到专家各个水平的参与者。

The project attracted participants across the entire ___spectrum of skill levels, from beginners to experts.

雨后天空出现了由七种颜色组成的光谱。

After the rain, a ___spectrum of seven colors appeared in the sky.

彩虹展示了阳光的不同颜色光谱。

The rainbow displays the visible ___spectrum of sunlight.