他失业后,精神非常颓丧.He was down in the dumps after losing his job.战后许多城市到处可见颓垣残壁.After the war many cities were full of rubble.我不忍看到你如此颓丧.I can't endure to see / seeing you so discouraged....
The channel is overlain by siltstone and lenticular beds of limestone.河道上面覆盖着粉砂岩和石灰岩透晶体.It is also wedge - shaped to lenticular.另外,它也呈楔 状 至透镜状.Several clouds are stacked up into one striking lenticular cloud.进而导致成群的云系堆积成...