问题: or that
If you cannot understand your teachers or that they are speaking too quickly, don't hesitate to ask them to slow down or speak more clearly.
请解释or that中that的作用，我感觉怎么好像是多余的？
解答:
If you cannot understand your teachers or that they are speaking too quickly, don't hesitate to ask them to slow down or speak more clearly.
请解释or that中that的作用，我感觉怎么好像是多余的？
这里 or 是“或者”的意思。如果你不能理解你的老师，或者他们说得太快的“内容”
这里that 是understand 的2个宾语之一，一个是your teachers 一个是that
they are speaking too quickly 是代词that的省略了关系代词that的定语从句。这里speak用的是及物动词用法。
如果这里直接用what就明显了，只是用that(that)来替换了what
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