I hope this will lead to further business between us.
我希望这次交易将使我们之间的贸易能得到进一步发展。
What were you doing at about 4 o'clock yesterday afternoon?
你昨天下午在大约4点钟正在做什么?
Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.