variable sign

Congestion of the mucosa is a variable sign.

粘膜充血是不恒定的表现.

Environmental variables are available inside VUE scripts by preceding the environmental variable name with the$ ( dollar) sign.

在环境变量名称前面加上$（美元）符号，就可以在VUE脚本中使用环境变量。

If you choose to pass a variable by reference, prefix it with&, and put it inside the []; for variable passing by value, prefix it with the equal sign (=).

如果选择通过引用传递变量，就在它前面加上&并把它放在[]内；对于通过值传递的变量，在它前面加上等号（=）。

Replacing the sign function with fuzzy control logic, the fuzzy terminal variable structure guidance law is proposed. The stability of fuzzy controller is analyzed and proved by Lyapunov stability theory.

采用模糊控制逻辑取代符号切换函数，提出了模糊Terminal滑模变结构导引律，利用Lyapunov稳定性理论对模糊Terminal滑模变结构控制器的稳定性进行了分析与证明。

Scalar variable names always begin with a $ sign.

标量变量名称始终用一个$字符开始.