/əˈkrɒs; US əˈkrɔ:s ||; əˈkrɔs/adv prep1 from one side of sth to the other 由一边到另一边: The stream was too wide to jump across. 溪面太宽，跳不过去。He walked across the field. 他走过田野。A smile spread across his face. 他满脸笑容。The river was about 20 metres across. 那条河大约20米宽。The bank has 800 branches across (= in all parts of) the country. 这家银行在全国各地有800家分行。
2 on the other side of sth 在另一边: There's a bank just across the road. 马路对过就有一家银行。The house across the road fromus is for sale. 我们马路对面那幢房子是供出售的。
We can use across or over to mean ‘on or to the other side’ I ran across/over the road. But when we talk about crossing something high, we usually use over I can't climb over that wall. With ‘room’ we usually use across I walked across the room to the door. 可以用 across 或 over 来表达“在或到另一边 ”的意思：I ran across／over the road. 我跑过马路。如果是指越过高处就通常用 over：I can't climb over that wall.那堵墙我爬不过去。指“穿过房间”则通常用 across：I walked across the room to the door. 我穿过房间走到门口。 across the board involving or affecting all groups, members, cases, etc 牵涉或影响全局的；全面的；整体的