For the finale, he creates a rainbow by shining a bright light into a glass sphere containing a single drop of water.

最后，他用亮光照射一个玻璃球，里面只有一滴水珠。彩虹出现了。

youdao

That will tell you, say that you drop some ink into a glass of water.

把墨水滴到一杯水中。

youdao

That will tell you, say that you drop some ink into a glass of water.

把墨水滴到一杯水中。

youdao