Dr. Tonegawa won the Nobel Prize for discovering how the body can constantly change its genes to fashion a seeming unlimited number of antibodies, each specifically targeted at an invading microbe or foreign substance.
seeming unlimited number of antibodies, each specifically targeted at
seeming unlimited number of antibodies, each targeted specifically to
seeming unlimited number of antibodies, all specifically targeted at
seemingly unlimited number of antibodies, all of them targeted specifically to
seemingly unlimited number of antibodies, each targeted specifically at
初看 DE中的all还是each都是OK的,但是看到未划线部分的an,
教训:时刻注意未划线部分的提示;
哦对对你说的对
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