explain in a systematic way造句

例句与造句

1. There are, however, many departures from the trend that are difficult to explain in a systematic way : in particular, the appearance of modern man about 100, 000 years ago was marked by a decrease in body size at the same time as an increase in brain size.
2. It's difficult to find explain in a systematic way in a sentence. 用explain in a systematic way造句挺难的