矿物往往埋藏在地层深处.Minerals are often found deep in the ground.在圈定地层过程中,植被往往具有很大的作用.The role of vegetation in outlining formations is often of great help.我们把它们当作实际上的地层单元来考虑,它们主要由岩浆沉积作用所产生.We regard them as actural stratigraphic...
He introduced his speech with a humorous anecdote.他讲了一则幽默轶事作为讲演的引子.He has a talent for recollection and anecdote.他在记忆力和讲述趣闻轶事方面颇具天赋。The image of the fox as a pest is grossly exaggerated in anecdote and folklore.狐狸的害人精形象在...