But the H1N1 2009 is an entirely new combination of four genetic elements: a bird flu, some human flu genes and two types of swine flu.
但2009年的H1N 1流感结合了四种基因成分，因而是全新的。这四种基因成分分别是：禽流感，一些人流感基因，以及两种猪流感。
Ceramic which is made shaped with water, dried in air, and made durable by fire, represents the ideal combination of the four elements that the ancients believed compose the world.
以土为原料，用水调和成型，在空气中干燥，经焙烧而经久耐用的陶瓷，代表着古人心目中组成世界四元素的理想组合。
应用推荐