This was because the pandemic virus spread faster than would be expected if there were widespread immunity to it, and because antibodies to the seasonal vaccine do not cross-react with it.

这是因为大流行病毒比预料传播更为迅速，即使对它有普遍免疫性，季节疫苗的抗体与它也没有交叉作用。

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The team found no further evidence of malaria, and the test that originally detected it has since been withdrawn as it can sometimes cross-react with other substances.

研究团队没有发现疟疾的进一步证据，最初发现疟疾的测试因此作废，因为有时测试会同其它物质发生交叉化学反应。

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Antibodies respond to the quaternary structure of proteins so their potential to cross-react with an alloantigen is very low.

抗体对蛋白质的四级结构产生应答，因此它们对同种异型抗原发生交叉反应的能力较弱。

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Blackman danced past a couple of challenges in the 10th minute and United defender Paul Dixon had to react smartly to clear his wicked low cross.

BBC: Sport - Football - Motherwell 2-1 Dundee United

Sunderland posed the first threat of a mediocre first half when Andy Reid's cross evaded Olsson, but striker Djibril Cisse could not react quickly enough to take advantage.

BBC: West Brom 3-0 Sunderland

But the Briton took the next four points, gaining a crucial one on the Frenchman's serve when he was quick to react to a drop shot and steer a forehand winner cross court.

BBC: Alex Bogdanovic, British tennis player