pessimistic time estimate

例句：

1. 1. The forecast forthe next few days is very pessimistic.
   对接下来几天的预测非常悲观。
2. 2. He was pessimistic aboutthe outcome of the meeting.
   他对会议结果持悲观态度。
3. 3. The gloomy weather madeeveryone feel downcast.
   阴沉的天气让每个人都感到沮丧。