少于的英文短语是Less than。Less than的例句：I use watercolours much less than I do oils or acrylics（我用水彩比用油画颜料或丙烯酸颜料要少得多）。

Less than的例句：The game took her less than an hour to finish（她没用一个小时就拿下了这场比赛）；The repaired sail lasted less than 24 hours（修好的帆支撑了不到24小时）。