The parachutelike membranes of Africa's scaly-tailed flying squirrels differ from those of the flying squirrels in the family Sciuridae because they are attached to a cartilage rod at the elbow instead of the wrist.
The parachutelike membranes of Africa's scaly-tailed flying squirrels differ from those of the flying squirrels in the family Sciuridae( because they are attached to a cartilage rod at the elbow instead of) the wrist.
(A) because they are attached to a cartilage rod at the elbow instead of (B) because of being attached to a cartilage rod at the elbow rather than at (C) in their attachment to a cartilage rod at the elbow instead of being attached at (D) in that they are attached to a cartilage rod at the elbow rather than at (E) in their being attached to a cartilage rod at the elbow instead of
the correct idiomatic expression with 'differ' is 'differ in...', so a-b are out. (if you said 'differ because', you'd have to give the reason behind the genesis of the difference, not the nature of the difference itself.) that leaves c-d-e, which all contain the supposedly ambiguous pronoun - so you're stuck with it.
这里的in that 的用法和一般的有所不同 RON的解释the correct idiomatic expression with 'differ' is 'differ in...', so a-b are out. (if you said 'differ because', you'd have to give the reason behind the genesis of the difference, not the nature of the difference itself.) that leaves c-d-e, which all contain the supposedly ambiguous pronoun - so you're stuck with it.