a difficult delivery的用法和样例：
- The mother had a difficult delivery.
- The midwife had no such skill. All she could say was that it might come out cross-wise and be a difficult delivery.
- Gaining too much weight raises the risk for having a baby that is too large, which may lead to a difficult delivery or Caesarean section, she said.
- This maneuver may be performed prophylactically in anticipation of a difficult delivery.
- She handled a difficult argument skilfully.
- He is unable to do such a difficult job now.