他在百米赛跑中获得了第二名。

He came in ___second in the 100-meter race.

小狗在后院拉了一泡便便。

The puppy did ___number two in the backyard.

这家餐厅的主菜很棒，但配菜只是二流水准。

The main dishes at this restaurant are excellent, but the side dishes are just ___second-rate quality.