A colloid of life is the unknown factor between the animate and the inanimate." (Jubbs Cell Rejuvenation, p.14.)

生命胶质是介于生命体和非生命体的未知介质。

youdao

X unknown factor (x factor) : find yourself and other people's expertise to find everyone's advantage and it has played out.

X未知因数(X factor)：发现你自己和别人身上的特长，找到每一个人的优点，并将它发挥出来。

youdao

Your unknown factor makes you a possible liability, and so they are taking a risk by giving you a chance. You should be thankful for the opportunity to prove yourself.

你的未知因素让你有了承担了这个责任的可能性，所以他们愿意冒着这个风险给你这个机会，你应该感谢有这样一个机会来证明自己。

youdao

Ms. DUFFY: The big unknown factor in this race is what kind of role Dean Barkley is going to play and who exactly he draws vote from.

NPR: In Minn., A Tight Race For U.S. Senate

Multiple-expansion is always an unknown factor in predicting stock returns.

FORBES: The Next 10 Years

Mike Hancock, the Lib Dem MP for Portsmouth South agreed that comparisons were unhelpful, but argued it was difficult to make decisions about shipbuilding contracts with the "unknown factor" of the referendum.

BBC: Should the Royal Navy order ships from Scottish yards?