介词 prep.
1.横越,穿过
We walked across the street.
我们穿过马路。
2.在...那边
He stared at the Englishman across the table.
他两眼一直盯着坐在桌子对面的那个英国人。
3.与...相交叉
The two lines cut across each other.
两条线相互交叉。
down1
副词 ad.
1.向下;向楼下
A cup fell down to the ground.
一个杯子掉到地上。
2.在下面
Down in the valley the fog still lingers.
下面山谷里仍然雾气蒙蒙。
3.(坐)下,(躺)下;(咽)下
The child could not get the pill down.
孩子吞不下药片。
4.向南方;在南方
They go down to Florida every winter.
他们每年冬天南下去佛罗里达。
5.去市中心,去商业区
6.(记)下,(抄)下
7.(物价、地位等)下降;(境况)变差
Prices have gone down.
物价下跌了。
8.(程度、数量等)减少,减弱
The train is slowing down.
火车正在减速。
9.从早期起,从祖先传下
10.立即付现
You can pay $10 down and the rest later.
你可现在付十元,其余的以后再付。
11.彻底地,完全
追问你这个我看过了。。。。。问的是干什么用的它们旁边的四线格，要填什么！！！