Like making a key for a lock you've never seen, designing an uber-specific microscopic agent to track down an "unknown threat" may prove slightly difficult.
就如同为一只你从未见过的锁，制作一把钥匙一样。要想设计这样一种超级具体的微型代理装置去追查“未知的威胁”，将会是有难度的。
But identifying previously unknown malware is difficult, and keeping track of different variants of existing viruses makes it harder.
不过辨认未知的恶意软件是困难的，继续了解现存各种病毒的差别将更加困难。
When the inertial parameters are unknown, two adaptive control schemes are proposed based on the results for a free- floating space manipulator system to track the desired trajectory in workspace.
在此基础上，给出了系统参数未知时由空间机械臂末端惯性空间期望轨迹产生机械臂关节铰期望角速度、角加速度的增广自适应控制算法。
Camouflaging network service can monitor and track attacks and its processes; also it can find unknown attack and its characters.
基于伪装网络服务监测跟踪攻击行为及过程，可以有效地研究发现未知攻击方式及其特征。
However, when the number of objects to track is unknown or varies over time, tracking hypothesis with different Numbers of objects have to be compared.
而当目标数未知或随时间变化时，需要对不同目标数的跟踪进行比较。
This is a world full of unknown, which makes people perplex and wander from the track. Where from, where to?
这是一个充满未知的世界，令人茫然摸不着边际，从哪里来到哪里去？
Finally, the question of the point-spread function's unknown parameter solver is settled by using the precision rule and the max-track way.
采用清晰度准则及最大值跟踪法解决点扩散函数的未知参数求解问题。
Finally, the question of the point-spread function's unknown parameter solver is settled by using the precision rule and the max-track way.
采用清晰度准则及最大值跟踪法解决点扩散函数的未知参数求解问题。
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