Skin graft has been improved obviously since recent years.

皮肤移植术，近年有明显进展。

youdao

In the recent 50 years since only a few inventions have been made.

而近50年来，只有为数不多的发明。

youdao

In the recent 50 years since only a few inventions have been made.

而近50年来，只有为数不多的发明。

youdao