He wiped away the blood with a paper napkin.他用纸巾将血迹擦去。I'm a blood donor; I can't risk any contagion.我是献血者，我不能冒任何接触传染的危险。The victim suffered a dreadful injury and lost a lot of blood.受害者受了重伤，大量失血。...
Educators try to put pupils of similar abilities into classes because they believe that this homogeneous grouping is advisable.教育学家设法将学生按相近的能力分班,因为他们认为这种按同等水平划分班级的做法是明智的.Another particle grouping is referred to as charge...
Children should not drink fruit juices straight.儿童不应该喝纯果汁。Some fruit juices are very acidic.有些果汁酸得很。Fruit juices ferment if they are kept for too long.果汁存放过久就会发酵。...