He was anxious about the enormity of the task ahead.
他为眼前任务的艰巨性而感到焦虑。
apprehensive[ˌæprɪˈhensɪv]
The long delay had made me quite apprehensive.
长时间的耽搁使我相当忧虑。
fraught [frɔːt]
It has been a somewhat fraught day.
这是令人颇为担忧的一天。
沮丧的 sad
depressed [dɪ'prest]
She felt very depressed about the future.
她感到前途无望。
gloomy ['gluːmi]
They found him in gloomy, downbeat mood.
他们发现他情绪低落,无精打采。
frustrated[frʌ'streɪtɪd]
Both sides in the dispute appeared very frustrated at the lack of progress.
争执双方因事情毫无进展而显得十分沮丧。
怀疑的 doubtful