They used the rivers for travel and they called the large piles of driftwood that sometimes blocked their way embarras.

他们称阻挡他们沿水路行进的一堆漂流木为embarras。

The lack of data and availability is a major problem that embarras ses human reliability analysis (HRA) for a long time.

数据匮乏与可用性差是长期困扰人因可靠性分析（HRA）的一大难题。