His theory is based on the assertion that through evolutionary history, men have always been "mildly polygamous".

他的这番理论建立在人类进化史之上：人类一直以来都倾向拥有多个伴侣。

youdao

There is no more cowardly, dastardly slander than is contained in the assertion that the majority or any considerable proportion of working, men neglect their families through drink .

有人硬说大多数或相当数量的工人爱喝酒，不顾家，这是带诬蔑性的和最卑劣的恶言中伤。

youdao

But for every strong assertion that echoed through the hall, the echoes of three years of past speeches added a question: Are good values enough?

CNN: Obama on world stage: More hope than change?