Scientists have tried to set fire to underground coal to speed up the fires.

Scientists have given many ideas for ______space. trie,tiring,tired的区别 求翻译：Japanese scientists have created a power Scientists have lots of idea 要成单数的哦, Scientists have d_____ that this disease is carried by mice. Scientists have already made robots to walk and dance 改错 Scientists have already made robts walk and dance.否定句 scientists have a____found ways to ……首字母 British scientists have a 20-year study.汉语意思是什么 Scientists have much knowledge about trees.同意句 Many scientists have created a new t____ to diagMany scientists have created a new t____ to diagnose and treat children born with heart disease. 口译听力问题1Scientists have yet to develop battery-operated cars.何意? Scientists have learnt a grate deal about the kinds of food people need. Until recently scientists would have disapproved of such an idea.啥意思? Scientists have discovered that sleep and dreams effect the way people feel. 初三英语第八单元的词汇- -首字母填空Scientists have given many ideas for ______space. Scientists have some w____ to tell whether something is a plant or an animal. Up to now scientists have not found how to cure patients of that disease.译成中文