您要查找的是不是：
- Of course, peering into any unknown system for the first time is easier said than done. 当然,第一次探究任何未知的系统都是说起来容易做起来难。
- The adaptive backstepping sliding mode controller designed in this way has an ideal regulation effect of buffer queue length on unknown system dynamics and uncertain disturbances and constricts them. 通过该方法设计的自适应反演滑模控制器，能够抑制系统的未知动态和不确定性扰动，使缓冲器队列长度的调节达到理想效果。
- The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员。
- The star of the film is a previously unknown actor. 这部电影里的明星以前是个默默无闻的演员。
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Its greater part is unknown to me. 它的大部分对我是未知的。
- He was an unknown painter one year ago. 一年前，他还是一个不为人知的画家。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- The drainage system has been aged. 排水系统已经老化了。
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- Kate is in bad with Lucy for some unknown reason. 因为某些不为人知的原因，凯特和露西关系不好。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- It is no safe wading in an unknown water. 不知水深浅，涉水不安全。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
