那是数字“4”，不是单词“四”。

That's the number four not the word four.

youdao

SAT 分数从1963年开始下降；今天，平均有30%的学生没有在四年内完成高中学业，这一数字在贫穷的城市社区达到了50%。

SAT scores began dropping in 1963; today, on average, 30% of students do not complete high school in four years, a figure that rises to 50% in poor urban neighborhoods.

youdao

没有数字，健康成年人能准确区分或回忆起的数量会降低至四。

Without numbers, healthy human adults struggle to precisely distinguish and recall quantities as low as four.

youdao