評(píng)論
打印
例：A sparrow roosted in the small tree.
詞根記憶：rot(旋轉(zhuǎn))+ate(使…)--旋轉(zhuǎn)
例：A circular rim is rotating 300 times per second.//rotate the crops輪種莊稼
派生詞：rotation(n．旋轉(zhuǎn))
詞根記憶：來(lái)自rotation(n．旋轉(zhuǎn)，回轉(zhuǎn))
例：Outside the nucleus the rotational velocity would decrease geometrically with distance from the center.
同根詞：rotatable(a．可旋轉(zhuǎn)的；可循環(huán)的)
詞根記憶：來(lái)自rough(a．粗暴的)
例：Total dollar sales for each of the company's divisions have remained roughly constant.
5.round v.四舍五入(to express as a round number);完成(to bring to completion);a.圓的(circular);n．圓(circle)
例：When the decimal is rounded to the nearest hundredth, 3.24 is the result.
詞根記憶：來(lái)自royal(a．皇室的)
例：Faculty members should retain the royalties from books and articles they write.
同根詞：royalist(n.?；手髁x者；a．保皇的)
例：Mary turned the rudder sharply to avoid hitting the rock.
詞根記憶：rudi(無(wú)知的，粗魯?shù)?+ment+ary--無(wú)知狀態(tài)--初步的
例：Technology for tabulating census information was rudimentary during the first half of the 19th century.
同根詞：erudite(a．深?yuàn)W的)
例：The floor is covered by a rug.
