based on scientific evidence
意为：
在科学证书的基础上；基于科学证据
based on
英[be?st ?n] 美[best ɑn]
[词典] [法] 以…为依据;
[例句]The selection process is based on rigorous tests of competence and experience.
选拔过程是基于对能力和经验的严格测试。
scientific
英[?sa?n?t?f?k] 美[?sa?n?t?f?k]
adj. 科学的; 有系统的; 应用科学的; 精通学理的，有学问的;
[例句]Scientific research is widely claimed to be the source of the high standard of living in the US.
科学研究被普遍认为是美国高生活水准的源泉。
evidence
英[?ev?d?ns] 美[?v?d?ns]
n. 证据; 迹象; 证词; 明显;
vt. 表明; 使明显; 显示; 证实;
[例句]Ganley said he'd seen no evidence of widespread fraud
甘利说他没有看见诈骗泛滥的证据。