脚踩两只船的英文：
sit on the fence

sit是什么意思：
v. 坐；开庭；栖息；位于；处在；任职；搁置；参加考试；代人临时看管小孩；合身
n. 坐，坐着的时间，（衣服）合身

to sit for business
因公滞留

to sit for somebody
为某人做临时保姆

Sit on a volcano
处境十分危险

They are sitting in a semicircle.
他们正围成半圆形坐着。

He sits no sure that sits too high
高处不胜寒

fence是什么意思：
n. 围墙，栅栏；障碍物；销赃犯
v. 用篱笆围住；防护；搪塞，支吾

The horse stopped short at the fence.
马跑到篱笆处突然停了下来。

The horse refused the first fence.
这匹马不肯跳过第一道栅栏。

That fence is the limit of the school.
那堵围墙是学校的界限。

A white fence enclosed the house.
房子周围有一圈白色的篱笆。

The horse negotiated the fence with ease.
那马轻易跳过了栅栏。