in the extent to which ?

簡單地說
不是修飾，是指示

所以指的是後面的
an asset[這資產或實業]
其實咁複雜的句式是把意思
an asset的use/usage的extend或manner
正如這句中的「的」會很難看/讀，所以英文可以分開/拆開來分層表達。

分句寫會是
The extend of use/usage of an asset.
AND
The manner of use/usage of an asset.

或用an asset作主詞便會是
An asset's extend of use/usage.
AND
An asset's manner of use/usage.

等等的意思。

這些是組句的技巧，並不是特定phrase form，或許叫做preposition clause而不是phrase.我自問不太懂英文文法的各種格式，這點可能不太專業的回答。

the extent to which = how much
the manner in which = how

Both "to the extent" (to what extent) and "in the manner (in what manner) are adverbials (prepositional phrase functioning as adverb)

2012-07-13 21:58:13 補充：
in the extent to which, or the manner in which, an asset is used or is expected to be used.

This is a prepositional phrase functioning as adverb (adverbial phrase), which modifies the verb to tell, under what situation or in what area, "significant changes have taken place".

(1) in = 在...方面
(2) the extent to which = how much = 程度上
(3) the manner in which = how = 方式上

(4) the extent to which an asset is used or is expected to be used = 資產使用或預期使用的程度 (使用多少)
This is a nominal relative clause to tell more information about the extent; i.e "what extent" or how much.

(5) the manner in which an asset is used or is expected to be used = 資產使用或預期使用的方式 (怎樣使用)
Same as (4), this is a nominal relative clause to tell more information about the manner; i.e. "what manner" or how.

(4) and (5) are joined by a coordination conjunction "or".

全句譯:
在 資產使用或預期使用的程度或方式 方面，對機構帶來不利影響的重大變化 於期內已經發生 或 在不久將來即將發生。



2012-07-13 22:04:06 補充：
(4) and (5) are noun clauses, being the object of the preposition "in" (在...方面).

2012-07-13 22:08:46 補充：
Correction: (4) and (5) are nominal relative clauses functioning like noun phrases, which are the object of the preposition "in" (在...方面).

2012-07-20 10:00:42 補充：
Jenkin wrote : "我自問不太懂英文文法的各種格式，這點可能不太專業的回答。"

I have to praise him for his honesty and modesty.