老师通过表扬他的努力来肯定这个学生的价值。

The teacher ___validated the student's worth by praising his efforts.

她的理论通过多次实验得到了验证。

Her theory was ___validated through multiple experiments.

这份合同需要由律师验证才具有法律效力。

This contract needs to be ___validated by a lawyer to be legally binding.