两台卸料器分别与下层皮带输送机相对应，并可切换。
The two unloaders correspond respectively to the lower layer belt conveyor and can be switched.
这些系统消息还随聊天记录文本一起保存起来，并可以进行切换。
These system messages are also saved along with the chat transcript text and can be toggled on and off.
如果使用旧版本，最好切换到Linux，它在相同的硬件上运行更快并可免费获得。
If you are using a version that old, you are better off switching to Linux, which will run faster on the same hardware and can be obtained for free.
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