无法了解的

The power supply part, as a result of the windsail mask, we are unable direct-viewing understanding it to supply power the part complete picture.

供电部分，罩的遮挡，我们无法直观的了解到它供电部分的全貌。

In a ten-foot dingey one can get an idea of the resources of the sea in the line of waves that is not probable to the average experience, which is never at sea in a dingey.

在一条十英尺长的小船，一个人可了解大海如何善兴作浪；而对一般从未乘小船漂海的人来说，这是无法了解的。