v.是(be的第三人称单数一般现在时)
The boy is 150 centimeters tall. 这个男孩有150厘米高。
There is no doubt about it. 那是毫无疑问的。
A friend in need is a friend indeed. 患难之交才是真朋友。
Pain past is pleasure. 过去的痛苦即是快乐。
The room is 15 feet in length and 10 feet in breadth. 这房间长15英尺,宽10英尺。