when it comes to当提到……；当谈到……
例句：Kate is not good at history, but when it comes to chemistry she's the best in the class.
凯特对历史不擅长，但一谈到化学她则是班里最好的。
2. The US Geological Survey estimates that around 30 percent of the yet-to-find gas and 13 percent of the yet-to-find oil is located in the Arctic.
locate in在某一点设置
例句：The building is located in a business center.
该大楼位于商业中心。
3. In reality, any Arctic exploration will benefit the rich people and provide us with the energy that we already have.
provide with装备,供给
例句：Somehow she managed to provide her children with food and clothing.
她总算设法使她的孩子有饭吃,有衣穿。
4. OECD countries spent approximately 2.2 percent of their GDP on oil imports during 2011, which means they imported 60 percent of their needs.
spend on把…花在…
例句：He doesn't spend much time on his homework.
他花在作业上的时间不多。
