Oil-craving world leaders are searching the Sahara for signs of oil riches deep in the earth.
急着寻找石油的集团首脑正在撒哈拉中寻找地底深处有否石油的迹象。
2
The author travels deep into the heart of Africa, searching for answers.
本文作者深入非洲心脏地带，以探寻答案。
3
There is no efficient way for deep exploration of linked WSIL documents; manually searching links found within a WSIL document is far too time-consuming.