血红宝石：缅甸出口的产品屈指可数，只有天然气，木材和宝石。
Blood rubies: Burma exports only a handful of products, such as natural gas, wood, and gems.
每天约有40%的壳牌产品是由天然气的形式供能。
Around 40% of Shell's daily production is now in the form of gas.
它可以有效汲取天然气燃烧热量的60%，而上几代产品能够达到55%左右的都很少。
It can extract more than 60% of the energy from the natural gas it burns; earlier generations seldom got above the mid-50s.
应用推荐