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1.so-called 所谓的
How have these so-called improvements helped the local community?
这些所谓的进步对当地社会有什么帮助呢？
2.up in the air 天空中
You'd turn on the water, and it would shoot straight up in the air.
你若打开水龙头，水会直往上喷。
3.hold on to 守住
Jane is determined to hold on to her fortune.
简决心要守住自己的财产。
4.on the ground 地面上
I set the log on the ground and shaved off the bark
我将原木放到了地上，刨掉了树皮。
5.be reasonable to 合理的
It seems reasonable to expect rapid urban growth.
似乎有理由期望城市快速发展。
