They're all now fine at writing and sending emails, but our trainer has just moved away, and we need two or three volunteers who can help the residents create documents.
他们现在都很擅长编写和发送电子邮件，但我们的培训师刚刚搬走，我们需要两三个志愿者来帮助居民们创建文件。
If we have two such machines with equal ha profiles, then we need two spares, and so on.
如果我们拥有两台具有相同的HA配置文件的机器，那么我们需要两个空闲节点，依此类推。
Therefore, we need two of them, one for trains and one for soldiers, as you can see on line 25.
因此，我们需要两个约束：一个用于火车，另外一个用于士兵，正如我们在第 25行中看到的一样。
Let's start with a triangle in the plane Well, then we need two vectors to describe it say A and B here. How do we find the area of a triangle?
平面上有一个三角形,用两个向量描述,记作A、B，怎样求三角形的面积？
Remember from the section on opening and closing that we need two parameters (file path name and access mode to the device) to open a device on Linux.
从有关设备打开和关闭的讲解可知，我们需要两个参数(文件路径名和设备访问模式)来打开Linux设备。
我们需要两位家长帮忙。
我们需要两位家长帮忙。
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