The masking threshold for each audio signal segment was calculated on the basis of psycho-acoustic model.
首先根据心理声学模型 ,计算载体音频信号的掩蔽门限 ,并利用人耳听觉的临界频率与小波包子带间的相似特性 ,将DFT域掩蔽门限映射到小波包域 ;然后将水印信号嵌入到中低频小波包系数中 ,嵌入强度由掩蔽门限自适应控制。
a chameleon camouflages itself by changing colour
变色龙用改变自身颜色的手法来掩护自己。
he kept on shooting with his machine gun, covering his battle companions.
他用机关枪不停地扫射, 掩护自己的战友。
No, he would stick to their wake and follow them; he would trust to the darkness for security from discovery.
对，他要盯着他俩，跟在后边走，靠夜色来掩护自己。
He covered his wife from the man's blows with his body.
他用自己的身体掩护他的妻子免受那人的打击。
trying to hide his relief.
尽力掩饰自己的欣喜。
He tried to surmount his embarrassment.
他竭力掩饰自己的窘态。
He tried to gloss over his errors.
他企图掩饰自己的过失。
Suddenly, the enemy is on the move, squeezing off a few rounds of covering fire as he runs.
突然，敌军士兵开始跑动，他边跑边开枪为自己作掩护。
This idiom comes from the above story. It is used to satirize those who they are smart but only deceive themselves.
“掩耳盗钟”后来变成“掩耳盗铃”，用来讽刺自作聪明，自己欺骗自己。
That writer could attempt to palm off an inferior and immature production under the cover of one successful effort.
一个作者，想方设法在一部成功作品的掩护下，把自己低劣、粗糙的作品推销出去。
Also when you try to send spy's to an enemy planet the spy uses your ship cloak level at the time you dropped them on the planet to try to sneak to the planet surface.
同样，当你试图将间谍派遣到敌方的星球上，间谍可利用自己船只的掩护级别潜入到敌方内部。
disguised her interest with nonchalance;
她用漠不关心来掩饰自己的兴趣；
In the course of the unification of Italy, the Pope lost control over most of his land.
他极力掩盖自己的错误，免得丢脸。
couldn't dissimulate her vanity
她掩饰不住自己的虚荣心.
Why was someone trying to disguise their voice?
为什么有人要故意掩饰自己的声音呢？
How can you cover up your mistake?
你怎么能把自己的错误掩盖起来呢?
He smiled to cover his nervousness.
他笑着掩饰自己的紧张情绪。
He smothered a yawn behind his hand.
他用手挡住嘴遮掩自己打哈欠。