表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来.Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid.从而为笔石反射率的正确测定和取值奠定了基础.These provide base for the correct measurement and val...
这里最常刮的风是西南风.The prevailing wind here is from the south - west.风是按照他的意旨刮的,海浪是按照他的意旨汹涌澎湃的.The winds blow at his bidding and the waves toss and range at his word.不管刮的是什么阴风, 这股火焰可不是注定要给吹灭的.Whatever hell winds blow, this is n...