"a bureaucracy...chiefly concerned with turf...and protecting the retirement system"
Throwing stones, turf and other missiles.
A low wall of turf and stones.
I..stood on the springy turf of the cliff-top.
Sow a lawn rather than turf it.
牛津高階第八版
美國韋氏詞典
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維基百科 (自由的百科全書)