如果你用的是双人模式，你需要尽可能的发挥你的优势，因为人对人的比赛是非常激烈的。

If you're in Two-Player mode, you'll need all of the advantages you can get, as the head-to-head racing is very competitive.

youdao

还要为单人模式添加一个用来检验控制操作单元测试，然后在菜单中添加支持双人模式的选项。

For multiplayer support you will have a unit test to test out the controls, which are then wired up to the main menu option to support the multiplayer mode.

youdao

当你测试双人模式后又想添加目录，然后你又将代码放到不同的位置，重运行电脑控制的那段代码，如此等等。

Then a little bit later after testing the 2-player mode you might want to add the menu and again you have put the code at a different location, re-implement the computer game code, and so on.

youdao