imperceptive 是什么意思

	adj. 无知觉的；无知觉力的。 n. -ness

	1.	Experimental results demonstrate that the algorithms are robust and imperceptive at the attack of noise stain , low - pass filtering and sampling again 仿真实验表明，本课题提出的各种算法能有效地抵抗白噪声污染、色噪声污染、低通滤波和重采样对水印的攻击。
	2.	I don ' t even see any relief after a month , but the athena 7 minute lift ? immediately seemed to remove the wrinkles , made them smoother , softer and the folds around my nose were almost imperceptive 但是雅典娜7分钟抗皱霜似乎立即就减轻了皱纹，周围的肌肤变的光滑，柔软，而且鼻子周围的痕迹似乎都没有感觉了。

imperceptive是什么意思