那么我写了if，后面跟着，我这里会用一个角括号，来代表这里有些东西，冒号后面跟着一些测试。

So we have if, and that is followed by, I'm going to use Angle braces here just to indicates something goes in here, some test followed by a colon.

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本文给出了双线性系统系数矩阵的李括号条件，在此条件下，可使双线性系统状态三角化。

Lie bracket conditions of matrices of bilinear control systems are given in the paper. Under these conditions the states of a bilinear system can be triangularized.

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这里有一个一角安装门板棒：滑动杆顶端门口袋小组通过顶端杆和稳固以括号。

Here's a tip when installing door panel rods: Slip the top rod pocket of door panel through the top rod and secure it to brackets.

youdao

这里有一个一角安装门板棒：滑动杆顶端门口袋小组通过顶端杆和稳固以括号。

Here's a tip when installing door panel rods: Slip the top rod pocket of door panel through the top rod and secure it to brackets.

youdao