每一部分都用图片讲解。Each section is explained pictorially.同学们对老师用风趣的方式讲解他们的错误很感兴趣.The students enjoyed their teacher's bantering them about their mistakes.你给孩子们讲解要设法讲得简单明了.Try to simplify your explanation for the children....
She used to come here every Saturday evening as regular as clockwork.她过去每逢星期六傍晚必来此地.After the clockwork of the watch was cleaned the watch kept perfect time.那块表的发条装置擦干净后,走起来就非常精确了.I'm telling you, Colombians are lik...
青足鹬产于欧洲的一种涉禽 ( 鹬属青脚鹬 ),腿绿色,喙长.A European wading bird ( Tringa nebularia ) having greenish legs and a long bill.它的喙长得象一根垒球棒, 尖得象一把细长的利剑.It looks like the beak of a softball stick, like a slender tip of the sword....
A proton is an elementary particle of matter.质子是物质的基本粒子。An electron has a negative charge, a proton has a positive charge.电子带负电荷, 质子带正电荷.The hydrated proton has been included in the calculations as one ion.水合质子作为一种离子包括在计...