急!Preprositions問題(20點!)

concentration其後可以跟on或of，但其意思不同
concentration on something即：集中力或專注於某事物，如：
concentration on civil right就是對公民權的專注
而concentration of a thing or substance是（事物或物質的聚集），如：
a low concentration of fertilizer就是低濃度肥液
但你的句子，卻不是對比賽的專注(其實應用the competition，因competition解作比賽是可數名詞，而解作彼此之間競爭才是不可數名詞），而是指：在比賽中，缺乏專注力。in (the) competition是用來修飾lack concentration這件事，是副詞片語，所以就可以用in（在．．．之中）
希望幫到你！




2009-08-12 23:15:17 補充：
capitalize是用on或upon，是指利用某事物，如：
people who have capitalized on violence.就是利用暴力的人們

A. Concentration
–verb (used without object)

5. to bring all efforts, faculties, activities, etc., to bear on one thing or activity (often fol. by on or upon): to concentrate on solving a problem. (集中力量/注意力處理某事)

6. to come to or toward a common center; converge; collect: The population concentrated in one part of the city. (位置的集中)


B. capitalize or -ise
Verb
[-izing, -ized] or -ising, -ised
1. capitalize on
- to take advantage of: e.g. to capitalize on the available opportunities

2. 沒有capitalise in 的；capitalise是直接用於名詞前；e.g. capitalise the expense (to an asset).