downadv.向下prep.沿着 ... 而下adj.向下的；消沉的；无礼的n.绒毛；汗毛v.击倒；打败；吞下；被抑制downbentadj.向下弯曲的；弯腰驼背的

1. Don't let the defeat dishearten you.
   不要因这一挫折而气馁。
2. He was discouraged by the unsuccessful attempt.
   这次不成功的尝试使他气馁。
3. He was upset by his failure in the exam.
   他因考试不及格而感到沮丧。
4. She was much cast down at the moment.
   她当时非常沮丧。