Human facial expressions differ from those of animals in the degree they can be
controlled on purpose.
A.with which B.to which
C.of which D.for which
Human facial expressions differ from those of animals in the degree they can be
controlled on purpose.
A.with which B.to which
C.of which D.for which
B
to a degree有点，稍微。句意为：“人的面部表情与动物的不一样，他们可以故意地稍微控制一下。”