Innovation in oil extraction must go hand in hand with environmental stewardship.
We can distinguish the blurred shapes and colours we see at a distance only because of the capacities of our eyes.
历史首先是那个遗产的创造和记录;进步是其日益增长的丰富性、保存、传递和使用。
一支最甜美的歌,往往是用于歌颂最悲伤思维的歌。