scientists tried in vain to do these experiments,翻译

scientists tried in vain to do these experiments,翻译 英语翻译Not only farmers but also scientists have studied weather forecast.People,for many centuries and in all countries,have studied the weather and tried to make weather forecasts.Sometimes distant objects such as hills and tall trees seem to Scientists have tried to set fire to underground coal to speed up the fires. Scientists in Business的中文名是什么?Scientists in Business的中文名士什么?在线等! She was tried in camera last week. 英语翻译Scientists use English ___ ___ in their work top separation The top separation scientists in the world. Yiwen has tried western food in a hotel in Nanjing . He tried and tried his very best not to join in. 英语翻译the scientists tried to learn how hot the weather was over a period of time,and find out how people feel.翻译句子 He tried not to take mixed up in politics.改错 He tried his best in the race.翻译 Have you ever tried () to a foreigner in English? He tried his key in some of the cars中文? his mother tried-----（not swim） in the river. his mother tried-----（not swim） in the river. I tried my best in my study 什么意思 scientists have made a lot of important d___ in science in the past ten years