For instance, eruptions during the snowball-Earth period are thought to have added sulfur particles to the atmosphere, blocking sunlight and cooling the planet.

比如，在“雪球地球”时期火山爆发使得空气中增加了硫粒子，它阻挡了太阳光线，使地球冷却。

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GD2 is thought to help conceal the tumor from the patient's immune system, so blocking it with the antibody opens the cancer to attack.

所以用抗体阻止GD2的功能，免疫系统就能找到肿瘤细胞，进而消灭肿瘤。

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The method should provide food for thought for Bjarnsholt, who has yet to find any serious candidate compounds for signal-blocking in P. aeruginosa infections in people with cystic fibrosis.

这种方法有可能为巴恩索特提供研究材料，他已经找出一系列阻断绿脓杆菌信号的候选化合物。

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Bed-blocking is often thought to occur due to a lack of care home places for the elderly.

BBC: Gloucestershire hospitals failing over 'bed-blocking'

They thought that by blocking these receptors with druglike chemicals they might shut down the signals for tumor growth.

FORBES: Targeting Tumors

These are compounds of oxygen, sulphur, selenium and tellurium that are thought to be particularly suitable for thermoelectric applications because their structure allows electric currents to flow while blocking thermal currents.

ECONOMIST: Thermoelectrics