首先自我推荐：爱因斯坦的英语很烂、“at all”的用法与老爱这个文盲

爱因斯坦回信的原文是：

Development of Western science is based on two great achievements: the invention of the formal logical system (in Euclidean geometry) by the Greek philosophers, and the discovery of the possibility to find out causal relationships by systematic experiment (during the Renaissance). In my opinion one has not to be astonished that the Chinese sages have not made those steps. The astonishing thing is that those discoveries were made at all.

如果爱因斯坦的"those discoveries"指上述“two great achievements（两项重大成就）”——形式逻辑和系统实验，那么形式上也不对劲。因为第一项“the invention of the formal logical system (in Euclidean geometry) by the Greek philosophers”是发明（invention），而非发现。第二项虽然是发现，但是只是单数，不可能用“those discoveries”。所以，爱因斯坦的"those discoveries"一定与“two great achievements（两项重大成就）”无关，可能是指中国古代四大发明或类似与西方的发现（不知具体是什么）。

Einstein's "those discoveries"为什么不是四大发明或发现 ...

郝炘：也谈爱因斯坦给斯威泽回信的翻译