Hard water furred the kettle.硬水使水壶生了垢.Is the kettle boiling?壶里的水开了吗？I'll put on the kettle for tea. Or boil up some coffee.我要烧壶水沏茶，或者煮些咖啡。The cordless kettle may now be a fixture in most kitchens.无绳电热水壶现在可能是多数厨房的固定设...
有必要让公众在充分知情的状况下展开辩论。There needs to be a properly informed public debate.我认为有必要考虑到各种可能性。I think one's got to consider all the possibilities.我认为我们有必要走开一下去考虑这件事。I think we need to go away and think about this....
Although the coral looks hard, it is very delicate.珊瑚虽然看上去坚固，实际上非常易碎。A coral reef is built by the accretion of tiny, identical organisms.珊瑚礁是由许多相同的微生物不断堆积而成。Coral can be yellow, blue, or green.珊瑚有黄色的、蓝色的或绿色的。...