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)Attiga阿提卡

1. I needed some orientation at this stage.
   我在这个阶段需要熟悉情况。
2. Here is his home town which he knows up and down.
   这儿是他十分熟悉的家乡。
3. He is skilled in upstairs politics.
   他精通上层政治。
4. I am completely at home in mathematics.
   我精通数学。