以及第二段第四行But those all-important ice-creating acrosols have hardly been studied in the Arctic—where they need to be studied most of all—because they exist at the edge of the planet, and not many scientists travel that far north.(然而,这些至关重要的形成冰层的浮质在最需要研究的...
You could extend your scope to include all of western Europe and go via the Arctic Circle, the roof of the Alps, hit most capitals in what was once Yugoslavia in a total of 23 countries, and find yourself back on The Euston Road 17.5 days later, all for the same price. If you wante...