num.三,三个,第三(章,页等) n.三岁,三个人[东西],三,三个 adj.三的,三个的
One survey revealed a threefold increasein breast cancer.
一项调查显示乳腺癌的发病率已是原来的3倍。
A threefold cord is not quickly broken.
三股拧成的绳子不易断.
Thus the second - lowest energy level of the particle in a cube is threefold degenerate.
于是立方体中的第二最低能级是三重简并的.