Hints: 本期學習的字源：quadr-=four 四，亦作quart- cello 單詞不需要大寫，單詞與例句或不同詞條之間換行即可。 注解中詳細介紹了單詞的拆分與釋義，是學習字源分析的重中之重！一定記得聽寫后來看注解！
quarter quadrant People who are right-quadrant dominant, or more artistic, emotional and spiritual, are very often left-handed. quadrilateral Squares, oblongs and trapezoids are all quadrilaterals. quadruped A majority of mammals are quadrupeds. quartet A string quartet consists of two violins, a viola and a cello.
People who are right-quadrant dominant, or more artistic, emotional and spiritual, are very often left-handed. 右半腦發(fā)達的人，也就是比較藝術性、情感性和精神性的人，通常都是左撇子。 Squares, oblongs and trapezoids are all quadrilaterals. 正方形、長方形和梯形都是四邊形。 A majority of mammals are quadrupeds. 大部分哺乳類都是四足動物。 A string quartet consists of two violins, a viola and a cello. 弦樂四重奏是由兩支小提琴、一支中提琴、一支大提琴組成的。