請問英文句子的結構與語義
下面是therein lies的定義，請問in what ...mentioned是當副詞使用嗎？為何直接接we？

in what has just been mentioned we see the reason or explanation for (a particular situation, quality or problem).

下面這是例句，我無法聊解句子的結構與意思。另外請問為何told直接皆在逗號只好，他的主詞是？
Her book is simply a collection of memories, told without conceit or self-absorption - and therein lies its power.

Question

請問英文句子的結構與語義
下面是therein lies的定義，請問in what ...mentioned是當副詞使用嗎？為何直接接we？

in what has just been mentioned we see the reason or explanation for (a particular situation, quality or problem).

下面這是例句，我無法聊解句子的結構與意思。另外請問為何told直接皆在逗號只好，他的主詞是？
Her book is simply a collection of memories, told without conceit or self-absorption - and therein lies its power.

Answer

therein = in there; in that fact
It's power lies in that fact = Therein lies its power.

"Therein" is a simple adverb of place. It has nothing to do with reasons or explanations.