unit 8. 翻译下列定语从句，请留意带下划线的句子。 Pat...

unit 8. 翻译下列定语从句，请留意带下划线的句子。 Patients who report a family history of hereditary disorders and possible malignancies should have appropriate screening. Food which is kept too long decays because it is attacked by yeasts, moulds and bacteria. In the old days people on long sea voyages used to go short of vitamin C, which made some of them fall ill. In 1952 London had a very bad four- day smog in which 4000 bronchitis sufferers died. All living things are made of cells, as we have learnt before. Two atoms of hydrogen, which we know as a gas, unite with one atom of oxygen, also a gas, to form a molecule of a liquid, water.