| 释义 |
step changeBrE /ˈstep tʃeɪndʒ/ NAmE /ˈstep tʃeɪndʒ/ noun [usually sing. ] (BrE ) a big change or improvement in sth 巨大变化；显著进步（或改善）◆ His speech called for a step change in attitudes to the environment in the 21st century . 他的演讲呼吁在 21 世纪彻底改变对待环境的态度。 |