A forty-foot-high concrete wall encircles the jail.
一道40英尺高的水泥墙环绕着该监狱。
《柯林斯英汉双解大词典》
2
His right hand, mean-time, describing stately circles--for it was representing a forty-foot wheel.
同时,他还用右手比划着画个大圈,这代表着一个四十英尺的大转轮。
3
Forty minutes later he was sleeping. Clem wandered up the stairs, sniffed him as he slept, and then paced in circles before finally curling up at the foot of his bed.