(1)由……构(组)成(be made up of or be composed of)[I+prep(of)][不用prog]：A football team～s of eleven players.一个足球队由11名球员组成。A week～s of seven days.一个星期有七天。A university～s of teachers，administrators and students.一所大学由教师、行政人员和学生组成。(the mixture)～of flour and water(这混合物)由面粉和水做成;(the soup)～of meat and peas (这汤)由肉和豌豆做成;(the dinner)～of three courses (晚餐)有三道菜;〖同〗contain，include;

(2)(存)在于，主要是(have sth as its most important or only part or feature)[I+prep(in)][不用prog](fml)：(courage)～in overcoming one's fears(勇气)在于能克服恐惧;(goodness)～in being honest(美德)在于为人诚实;(the beauty of sb's style)～in its simplicity(某人文风的精采之处)在于精练;Her charm does not～only (simply) in her beauty.她的魅力不仅仅在于美貌。Education does not～only (simply) in learning a lot of facts.教育不仅仅在于学会知识。〖同〗lie;