Physicians trying to treat brain tumors can use drugs to open the junctions between cells, but that leaves the brain temporarily vulnerable to infection.

治疗脑部肿瘤的医生虽然能够利用药物打开细胞间的接缝，但这也会使得大脑暂时很容易受到感染。

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But they are susceptible to infection with something called Mycoplasma gallisepticum, a bug that leaves them lethargic and sporting a bad case of conjunctivitis, otherwise known as pinkeye.

感染了这个，雀类就会昏昏欲睡，精神不振，还伴随着严重的结膜炎症，也就是红眼病。

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Lipoxygenase activity in rice leaves was induced markedly in response to incompatible infection with blast fungus, Magnaporthe grisea .

稻瘟菌侵染水稻后，诱导感染叶中脂氧合酶的活性上升。

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Yellow or brown areas shaped like the letter V on leaves may be a sign of black rot infection.

VOA: special.2009.03.03

There is another route being considered - involving a rare mutation that leaves people resistant to HIV infection.

BBC: Analysis: A cure for HIV?

The practice leaves the animals vulnerable to infection from migratory birds.

ECONOMIST: Turkey and bird flu

It leaves her weak, prone to infection and at risk of leukaemia.

BBC: New stem cell matching program for British Asians