Landscape beneath Antarctica's icy surface revealed in unprecedented detail 新地图呈现 ...

Thanks to data collected by satellites, scientists have a good understanding of Antarctica's icy surface, but what lies beneath has remained more of a mystery. In fact, more is known about the surface ...
BBC

Set off 和 set out 的区别

Helen 以上的例句中我们用 set off 或者 set out 表示“出发、动身”。 现在我们来看一下 set off 和 set out 的不同之处。 先说 set off, 它有好些含义。 我们可以用 set off 表示“启动什么东西，让它开始工作”。 请听例句。 Example Lily opened the door and set off the alarm.