quick to notice; showing quick and keen perception
例句
用作形容词(adj.)
Indeed, these former features will now be so glaringly obvious that the observer may suppose that some radical improvement has occurred in the observing conditions.也许北部的边缘变得亮了一些，火星也不再是均匀的橙色，但是仍然没有什么值得注意的东西。
