on all fours 用手和脚在地上爬；匍匐着
The baby crawled around the floor on all fours.
那个婴儿在地板上到处乱爬。
on all fours with （常用于否定句）与……完全相等/完全一致
This simile is not on all fours with the thing that is is supposed to illustrate.
这个比喻同那个要说明的事物不大贴切。
the four cornors of the country / the world 全国/世界各地
He has been to the four corners of the earth to widen his experience of life.
它曾走遍天涯海角来扩大他对人生的阅历。
the fourth dimension 第四维（在相对论中指时间）；日常经验之外的境界；虚无之境
It seems to me he is living in the fourth dimension.
我感觉他生活在第四度空间中[即生活在幻想中]。
four-eyes 四眼佬（指戴眼镜的人）
Hey, four-eyes, get over here.
嗨，四眼佬，到这边来。
Four eyes see more than two. [谚]两人总比一人想得周到。/三个臭皮匠赛过诸葛亮
You'd better ask your brother what he thinks of the new car. Four eyes see more than two.
你最好问问你兄弟他对这部新汽车的看法如何，两人总比一人想得周到。
He had to go _____ to squeeze through the opening.
A. on all four
B. on all fours
C. on all fours with
D. on fours
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