Eating in East Berlin used to be a hazardous and joyless experience.在东柏林就餐曾经是一件危险而且沉闷无趣的事情。Saunas can be hazardous if misused. Avoid a big meal beforehand.洗桑拿浴如果方法不当会有危险，浴前切忌饱食。German law forbids the dumping of hazardous...
The EPA's rules about what constitutes hazardous waste are backfiring against the nationwide recycling effort.环保署关于有害物质的法规同全国资源回收的工作正好唱反调.Its principal purpose is the cleanup of leaking hazardous waste disposal site...
Nowadays, only the two big houses remain roofed.现在，只有那两座大房子还有屋顶。They roofed the house with slates.他们用石板瓦做屋顶.The building is roofed entirely with translucent corrugated plastic.这座建筑完全用半透明瓦楞塑料封顶。...
他尝试着把牙齿放入牛奶 、 水和细胞培养液中.He tried putting teeth into milk, into water, and into cell - culture medium.然而, 在家里或学校里很少人手边有细胞培养液.However, few people keep cell - culture medium handy at home or in school.细胞 培养液 能够最好地在口外保持掉牙健康.T...