你需要有一辆相当坚固耐用的车子穿越沙漠。

You need a fairly rugged vehicle to cross the desert.

youdao

虽然你是这么认为，但是有一项研究显示鸣鸟的骨头实际上是相当坚固的。

Or so you'd think. But a new study shows that songbirds' bones are actually pretty tough.

youdao