You can find these doctrines at the bottom left of the tech tree.

你能在科技树的左下方找到这些学说。

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Yes, the tech tree and upgrade system will be fully configurable from the editor.

可以，科技树和升级系统在地图编译器中能被完全自定义。

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We've got a new tech tree system that allows you to research and enhance units.

我们有了一个新的科技树系统，让你研究和增强你的单位。

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