If marked in, the type can only appear as a parameter or set-only property.
如果标记为in，那么类型只能表现为一个参数或只写属性。
A marked change, as in appearance or character, usually for the better.
变化一个明显的变化，如在外表或性格上，通常是朝更好的方向变化。
These adjectives refer to something, such as activity or movement, marked by great speed.
这些形容词指活动或运动极为快速的事物。
They found, as before, that five or six houses were marked.
他们发现和上次一样，有五、六栋房子都被做了记号。
They found, as before, that five or six houses were marked.
他们发现和上次一样，有五、六栋房子都被做了记号。
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