我通常在4点半离开办公室.

I usually get away form the office at four - thirty.

苏珊娜：对不起，每月这个时候，我要与董事们开一次常务会议。你能在4点半召开的推介会结束后过来吗？

Susanna: Sorry, I have a standing meeting with the directors once a month at that time. Can you come by after the pitch meeting at 4:30?