late 14c., "rebel," agent noun from rise (v.). Meaning "one who rises" (from bed, in a certain manner) is mid-15c. Meaning "upright part of a step" is from 1771.
权威例句
1. He is an early riser.
他惯于早起.
2. He was an early riser and he would be at the breakfast table at seven.
他习惯早起,7点钟就坐在桌前吃早餐。
3. Our manager is an early riser.
我们的经理是一位精明能干者.
4. Sulfur content of gasoline reduces gradually along the riser.
汽油硫含量沿提升管高度增加而逐渐降低.
5. Using a stencil I then draw out the shape of the riser.