这种现象引起了人们很大的惊讶，因为当时每个人都会认为影像(或X -射线)是由在阳光的触媒下的某种化学反应所产生。

This was a great surprise because everyone thought that the shadow (or X-ray) had been created by a chemical reaction with sunlight.

youdao

这种现象引起了人们很大的惊讶，因为当时每个人都会认为影像(或X -射线)是由在阳光的触媒下的某种化学反应所产生。

This was a great surprise because everyone thought that the shadow (or X-ray) had been created by a chemical reaction with sunlight.

youdao