附近的一座火山猛烈爆发了，喷出大量熔岩和滚烫的泥流。A nearby volcano erupted violently, sending out a hail of molten rock and boiling mud.他们发现在大西洋两边都有巨大的水下泥流和冰崩沉积迹象.They found huge underwater mud - flow and avalanche deposits on both sides of the...
The use of a pressure canner is vital when canning meat.罐装牛肉时,压力罐的使用很重要.Two ways to keep fish for future use are canning and freezing.把鱼制成罐头和冷冻是保存鱼的两种方法.Britain'sambassador , Mark Canning , went there and met two de...
Preventers are usually brown, red or orange inhalers.这些预防类药物通常是褐色, 红色或者橙色的.How can we improve engines, inhalers, and extinguishers?我们怎样改进引擎 、 喷雾器和灭火器?...