across：
adv.從一邊到另一邊;橫過;寬;從…的一邊向…;在對面;在對過；
prep.從…一邊到另一邊;橫過;在…對面;在…對過;在(身體某部位)上；
例句：
The general had to get his troops across the river.
將軍必須讓部隊過河。
There's a school just across from our house.
有一所學校就在我們房子對面。
This view is common across all sections of the community.
該社群所有階層的人普遍持有這種看法。
The industry needs more investment across the board.
這一行業需要全面增加投資。