我认为可以肯定地说他将成为下一任总统。
I think it's ___safe ___to ___say that he'll be the next president.
或许可以放心地说,许多技术领域都严重依赖英文出版物。
It is probably ___safe ___to ___say that many technical fields rely heavily on English publications.
鉴于压倒性的证据,可以肯定地说他们的假设是正确的。
Given the overwhelming evidence, it is ___safe ___to ___say their hypothesis was correct.