writing paper and envelopes信纸和信封The writing paper is impressed with school seal.信笺上有学校的印记.Drouet selected writing paper while Carrie went to change her dress.杜洛埃找信纸写回信的当儿,嘉莉去换衣服....
Proctitis is common in patients undergoing pelvic radiation therapy.直肠炎常见于骨盆放射治疗的病人.This new plane is undergoing safety tests.这架新型飞机正在接受安全试验。New recruits have been undergoing training in recent weeks.最近几周，新兵正在接受训练。In 21 ...