Strung together over time, these choices can accumulate into feats of progress unknown to other animals.

随着时间的推移，这些选择可以累积成其他动物未知的进步壮举。

youdao

Unknown to me, he had already signed the agreement.

他背着我已签了协议。

《牛津词典》

There are many places on the earth that are still unknown to humans.

地球上还有许多人类未知的地方。

youdao

Their ancient languages contain a great deal of information about environmental systems and species of plants and animals that are unknown to scientists.

VOA: special.2009.12.02

A kind of a pin used to hold your cloak together, called a fibula, unknown in the previous period.

一种别住披风的别针,称之为扣针,这在之前的时期从未出现过

耶鲁公开课 - 古希腊历史简介课程节选

I've set these two things equal to each other: I've got one equation and one unknown.

我让两个方程相等,只剩下了一个等式和一个未知数

耶鲁公开课 - 博弈论课程节选

The sub-custodian can give it to yet another sub-custodian unknown to the original custodian.

FORBES: Gold ETFs And The Manipulation Game

For years, Mr. Paterno's salary unlike almost all coaches at public universities was unknown to the public.

WSJ: Joe Paterno Dies At 85 From Lung Cancer Complications

Until recently the Galilee basin coal was unknown to consumers and its quality untested.

FORBES: India's Big Bet On Australian Coal