4. The overwhelming weight of the coverage of the oil market by analysts and commentators concentrates on the supply side and the volumes being produced and exported from Saudi Arabia or elsewhere. Supply is important but costs matter more.
5. adj. 突出的，显著的，未支付的
6. Friends wasn't known for being the most diverse show on television at the time, since the cast was comprised of almost entirely white actors. None of the main characters were anything other than "mainstream." Even the acknowledgement of Ross's first wife Carol being a lesbian was met with jokes about sexuality (mostly from Joey), and sexist comments were frequently incorporated into the script.