After it had stopped snowing, we all went sledging.雪停了以后我们全去坐雪橇玩.Our hill is marvellous for sledging and we always have snow in January.在我们的那座小山上滑雪橇最棒了，而且1月我们那里总会下雪。The Olympic winter Games have to include skiing, ice - ...
我不愿意伸手去抓那闪亮的黄铜门环，怕把它弄脏。I felt loath to sully the gleaming brass knocker by handling it.他们的床都各具特色；马克的床是张带球形黄铜柱头的铁家伙。All their beds were distinctive; Mac'swas an iron affair with brass knobs.其黄铜支脚把厚绒地毯压出了印。Its brass f...
Insulin is produced commercially from animals.为获利从动物体内提取胰岛素。Insulin is secreted by the pancreas.胰岛素是胰腺分泌的。Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的....