约翰17岁时死于先天性心脏病。When John was 17, he died of congenital heart disease.凯特琳患有可能致命的先天性心脏畸形。Caitlin was born with a life-threatening heart abnormality.三个婴儿都有不可治瘉的先天性心脏病.All three babies were born with an incurable heart condi...
Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds , if it were not for the protection we get from insect - eating animals.昆虫会使我们无法在这个世界上生存: 如果不是由于...
A white chalk chalks white on a black blackboard.一根白色的粉笔在黑色的黑板上写白字.His steed was by chalks the best.他的马是最好的.The prisoner has walked his chalks , and is off to London.那囚犯逃走了, 逃到伦敦去了....drawing a small picture with coloure...