可惜在种种猜测之后，也慢慢无从所知了。
Unfortunately, after these speculations, the trail goes cold.
“这件事似乎非常不幸，不过关于他回去以后所遭遇的情况我无从所知”，他说。
"It sounds quite tragic, but as to the circumstances as to what occurred on his return I have no information on that," he said.
而河的另一边，是黑色森林的入口，深而暗的河水伸向了我们无从所知的另一头，充满着危险，却也显得那般强大而神秘。
To the north, guarded by dark forests, shrouded by purple cloud rising as the ice settled, the vast deep waters of Large Lee stretched into the unknown.
超过300个石球零散分布在哥斯达黎加，我们对它们的来历一无所知——人们在公元1000年时将它们弄回来的事迹已无从考究。
Over three hundred of them are scattered across Costa Rica, but we’ll never know why – the people who made them back in 1,000 C.E. are long gone and had no written records.
超过300个石球零散分布在哥斯达黎加，我们对它们的来历一无所知——人们在公元1000年时将它们弄回来的事迹已无从考究。
Over three hundred of them are scattered across Costa Rica, but we’ll never know why – the people who made them back in 1, 000 C.E. are long gone and had no written records.
超过300个石球零散分布在哥斯达黎加，我们对它们的来历一无所知——人们在公元1000年时将它们弄回来的事迹已无从考究。
Over three hundred of them are scattered across Costa Rica, but we’ll never know why – the people who made them back in 1, 000 C.E. are long gone and had no written records.
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