Well, it's a long headline, but we're looking at one word in particular.

这是个很长的标题，但我们要特别关注一个词。

Look at one word: You can use a rising-falling tone to sound excited: really?

看一个字： 可以用升降调听起来很激动：真的吗？

Children who still use only one word at a time may combine a word and a gesture; this successfully predicts that two-word phrases (" Give ball" ) are just around the corner.

一次只说一个单词的孩子可能会在说一个单词的时候再做一个手势，这能成功地预测孩子不久之后就会说两个单词的短语(给球)。