I am well aware it's time for me to leave. I am sorry for my disturbance for such a long time. I am really sorry. Goodbye.
I know it is time to leave now. Sorry to have disturbed you so long. Good bye.
faint!居然来广告了。
可以这么说：
i know it is time for me to leave now. I am sorry to disturb you for so long. Goodbye.
I know it's time for me to leave now.Sorry to disturb you so long time,goodbye
i understand it is time for me to leave. Sorry for bothering you for such a long time. See you.
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