他首先得弄清一些基本事实。He first had to get hold of some basic facts.弄清他在干什么是重要的.It's important to find out what he is doing.这些注释有助于弄清文中最难懂的部分.The note help to elucidate the most difficult parts of the text....
There was frequent thunder and lightning, and torrential rain.雷电交加，大雨倾盆。The game was cancelled owing to torrential rain.比赛因大雨取消了。The River Frome had burst its banks after torrential rain.暴雨过后弗罗姆河决堤了....
The path winds along mountain ridges.峰回路转.The sea floor is spreading away from the mid - ocean ridges.海底正在从大洋中脊扩张开来.The waves had pushed the sand into little ridges.海浪推动沙子形成了小小的沙垄....