The great unknown is when.

然而，究竟何时依然是个未知数。

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Take two steps north into the unsettled future, south into the unquiet past, east into the present day, or west into the great unknown.

迈开两步，向北迈进动荡将来，向南则为无宁过往，向东步回眼下此刻，或向西踏入未知境地。

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Your Week Ahead: There's nothing wrong with a brave step into the great unknown, as long as you appreciate that this is what you are taking.

你朝着巨大的未知迈出勇敢的一步，只要你意识到自己在做什么，那就没什么不对。

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And each query is met with the same guarded response: That's the great unknown.

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Now Armstrong has made another leap into the great unknown, having passed away today at the age of 82.

FORBES: Neil Armstrong, First Man To Walk On Moon, Dead At 82

What her role would be in making that happen remains the great unknown.

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