Silently, he let himself go into the unknown.

他默默地走进未知的世界。

The key may be tackling something new; the challenge of the unknown is likely more beneficial than putting together the same jigsaw puzzle over and over again.

关键可能在于处理一些新问题； 挑战未知的事物很可能比一遍又一遍地做相同的拼图游戏更为有益。

Ignorance of people brings fear, fear of the unknown.

人的无知带来了恐惧，对未知事物的恐惧。

Have patience with the unknown.

对未知的东西多点耐心。

Losers see the unknown as a risk.

l失败者把未知的东西视为风险。