DESIGN: a randomized single blind controlled observation.
设计：随机单盲对照观察。
That single negative observation had a profound effect on the way I felt and acted.
这种单一的负面观察了路上产生深远的影响，我觉得并采取行动。
The observation area is around the single bracked and twin bracked.
试验对象是一艘高速排水型船，观测区域是单臂支架和双臂支架。
The observation area is around the single bracked and twin bracked.
试验对象是一艘高速排水型船，观测区域是单臂支架和双臂支架。
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