It's getting late. Please excuse me, but I must leave right away.
时间不早了。对不起,我得赶紧走了。
Every dog is valiant at his own door.
站在家门口,狗也雄纠纠。
In the first place, any scientific study requires that there be no preferential weighting of one or another of the items in the series it selects for its consideration.