Volcanic island species are all transplants from distant locations and exist in combinations not found elsewhere.(火山島物種都是從遙遠(yuǎn)的地方移植過(guò)來(lái)的，它們的組合在其他地方是找不到的。)

How can volcanic activity occur so far from a plate boundary?(火山活動(dòng)是如何在離板塊邊界那么遠(yuǎn)的地方發(fā)生的呢？)

So this too suggests ongoing volcanic activity.(這也表明了火山活動(dòng)將會(huì)繼續(xù)。)

The Romans observed that, when volcanic ash mixes with water and then cools, it gets extremely hard and almost impossible to break up.(羅馬人觀察到，當(dāng)火山灰與水混合然后冷卻，火山灰變得非常堅(jiān)硬，幾乎不可能分解。)

Gas mixtures emitted from present-day volcanoes resemble this early atmosphere, suggesting its origin from volcanic eruptions.(現(xiàn)代火山釋放出的氣體混合物類似于這種早期的大氣，這表明它（地球）起源于火山噴發(fā)。)

The hard volcanic stone apparently had a secure market.(硬火山石顯然有一個(gè)可靠的市場(chǎng)。)

It was generally accepted that volcanic rocks with such high levels of magnesium could not exist.(人們普遍認(rèn)為，具有如此高鎂含量的火山巖是不可能存在的。)

Which of the following can be inferred from paragraphs 2 and 3 about the Volcanic eruptions of the late first millennium?(有關(guān)公元后一千年末期的火山爆發(fā)，下列哪一項(xiàng)可以從第2段和第3段中推斷出來(lái)？)

The reason is that rich volcanic soil makes the land fantastic for farming.(原因是，肥沃的火山土壤使這片土地極適于農(nóng)業(yè)。)

Although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area.(盡管起源還不確定，專家認(rèn)為這主要是由該地區(qū)頻繁的火山噴發(fā)所造成的。)