确实性地

例句：

1. 1. The scientist's theory is based on a high degree of certainty.
   科学家的理论基于高度的确定性。
2. 2.The decision was made with complete certainty.
   这个决定是绝对确定的。
3. 3.The evidence provided by the witness was undeniable and certainly proved her claim.
   证人提供的证据无可置疑，肯定证明了她的主张。