1.be known as 被称为

例句:She is known as a great beauty.
她是出了名的大美女。

2.steady growth 稳步增长

例句:A steady growth in the popularity of two smaller parties may upset the polls
两个较小政党的支持率稳步上升，可能会打乱投票结果。

3.middle-class 中产阶级

例句:She came from a stable, comfortable, middle-class family.
她出身于一个收入稳定、生活宽裕的中产阶级家庭。

4.legal force 法律效力

例句:Binding is the legal force to impose UN resolutions on the Member States.
约束力是指联合国决议对成员国具有法律效力。