该研究对两种经济体系进行了详细的比较。

The study ___carried ___out a detailed ___comparison between the two economic systems.

与旧型号相比，新型号的效率要高得多。

The new model is much more efficient ___in ___comparison to the old one.

与十年前的手机相比，现代智能手机的功能强大得令人难以置信。

Modern smartphones are incredibly powerful ___in ___comparison with those from a decade ago.