Right now,as schools prepare to begin a new year, one concern is the H1N1 virus, often called swine flu.
VOA: special.2009.08.13
It's the most simple-- or often called a bill-- a discount bond does not pay interest; it's sold at a discount.
它是最简单的,经常被称为国库券,它是一种贴现债券,且不付息,并以折扣价发行
London's often called "the world in one city".
伦敦常被称作“拥有整个世界的城市”。
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