1.年級：高二
2.科目：英文
3.題目：One of them is condensation, ________ two or more unrelated, or even c
ontradictory, dream thoughts are combined to form one single element.

4.想法：答案是by which
我認為主詞是dream-thoughts，所以dream-thoughts are combined by two or more unr
elated, or even contradictory to form one single element.
想請問這樣解釋對嗎？
謝謝

Two or more unrelated, or even contradictory, dream thoughts are combined to form a single element by condensation.

請問這裡的by是什麼意思？

這好像是龍騰B4的課文? 可以把這裡的by想成是through/inthe process of