虽然Wi - fi热点的覆盖面有足球场那么大，但信号在到达我的电脑之前还要穿过层层水泥。
Wi-fi hot spots are large — about the size of a football field — but those signals had to pass through a lot of masonry before they got to my laptop.
在世界各地的发现病毒热点地区，人们将通过手机报告可疑人类和动物死亡情况(通常这些是即将到来的疾病信号)。
People in viral hotspots around the world will report suspicious human and animal deaths (often a warning sign of a coming plague) by mobile phones.
将混沌学理论应用于多媒体信号的保密通信是网络安全的迫切需要，也是当今世界的前沿课题和研究热点。
It is an urgent need for network secure communication to apply Chaos theory to the multimedia signals transmission, and it is one of most advanced and hot research topics internationally.
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