他们围着老师的椅子站成半圆形回答问题。They stood in a semi-circle round the teacher's chair and answered questions.摆成半圆形的椅子a semicircle of chairs这个村庄是由半圆形的茅舍组成的.The village was formed of semicircle huts....
马克一声不响地给他们每人倒好饮料并端上来。Quietly Mark poured and served drinks for all of them.“好吧”，马克斯说，“回到正题上来。”"Now then," Max said, "to get back to the point."我停住脚步，等她追上来。I stopped and waited for her to catch up....