atprep.在；向；达n.基普(老挝货币基本单位)(=att)；[化]砹(极不稳定放射性元素)abbr.密封的(=airtight)abbr.气温(=air temperature)Atubo阿图博

1. They often entertained their friends at weekends.
   他们常在周末招待朋友。
2. That quiet student becomes quite randy on weekends.
   那位安静的学生在周末就变得性欲冲动。