It's got much longer and more sophisticated vocabulary, and it's got a fairly long sentence near the beginning.

它有更长的、更复杂的词汇，在开头有一个相当长的句子。

Another is that long and sophisticated vocabulary choices make listening more difficult.

另一个是冗长而复杂的词汇选择使听力更加困难。

One advantage is that it is much easier for speakers to pronounce short words correctly. Another is that long and sophisticated vocabulary choices make listening more difficult.

这样做的优势是，对于演讲者本身，短的词汇更好发音，而且长、难词汇听着很费劲。