Demography is like a supertanker ; it takes decades to turn around .
人口学就像一艘超大型油轮,要花费几十年的时间才能使它掉头。
Expert estimation , supertanker gross achieves 60 or so only , ability satisfies the carriage requirement of entrance of our country crude oil .
专家估计,超大型油轮总数只有达到60条左右,才能满足我国原油进口的运输需求。
After somali pirates shook the international maritime community on tuesday , hijacking a saudi supertanker with more than $ 100 million worth of crude oil , the indian navy has struck back , the christian science monitor reported .