1.early/late riserWAKE UP/GET UPsomeone who usually gets out of bed very early or very late 早起/晚起的人
Examples from the Corpus
early/late riser• A red squirrel was another early riser.• The restaurants are late risers as well.• There was the possibility of kingfisher and water rail for early risers on the morrow.• It will be particularly useful for early risers who once had to enduredeafening music from Benidorm bars until the small hours.• Graduate students in most institutions are notoriously late risers, who work way past conventionalbedtime.• At 0630 hours the first of the early risersentered the cookhouse for breakfast.• By the evening they are still full of energy when the early riserswilt.• We were early risers on the first morning.
2.technicalTB the upright part of a step on a set of stairs 〔楼梯台阶的〕竖板
3risers[plural]American EnglishAmE a set of wooden or metalsteps that can be moved from place to place, used for a group of people to stand on 活动阶梯平台
The school choir stood on risers behind the orchestra.