In the boat she felt helpless, unable to move around, sitting in one spot.
她在船上感到很无助，只能坐在一个地方，没法四处活动。
This technology could also allow an orchestra patron sitting behind a cloaked column to hear music as clearly as one in an unobstructed spot.
这项技术也可以被用于音乐厅，比如当管弦乐队演奏时，听众即便坐在涂有遮蔽材料的柱子后面，也可以不受影响的倾听现场演奏。
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