那只狗阴郁地盯着我们看了几分钟。The dog gazed at us lugubriously for a few minutes.他面色阴郁地凝视前方，假装没听见那些冷嘲热讽。He stared sullenly into space, pretending not to hear the jeers.他们中有很多人表情阴郁，留着平头，一看就是警察。Many of them were policemen, with their he...
The holes were sufficiently large to serve as nests.这些洞作鸟巢足够大。We found that birch bark could serve as paper.我们发现桦树皮可以作纸用.Such stories serve as a spur to children's imagination.这类故事能激发儿童的想像力....