The surprise came when he discovered how his new material responded to repeated stress.

当他注意到新材料受到连续作用力而产生反应时，令他惊讶的现象出现了。

youdao

The surprise came when he discovered how his new material responded to repeated stress.

当他注意到新材料受到连续作用力而产生反应时，令他惊讶的现象出现了。

youdao