TAILIEUCHUNG - Luyện thi IELTS (p80)

Tham khảo tài liệu 'luyện thi ielts (p80)', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | abcasiapacihc com studyenglish - . STUDY ENGLISH TRANSCRIPT EPISODE 16 DVT Hello and welcome again to Study English IELTS Preparation. I m Margot Politis. If you ve been on a flight recently you will have heard about the danger of sitting still for a long time in an aeroplane apart from the danger of boredom that is The danger is from a condition called deep vein thrombosis or DVT . Today on Study English we ll listen to a doctor talk about DVT then we re going to look at how to talk about things that might happen in the future. Deep vein thrombosis is where a clot forms in the calf veins and occasionally in the veins of the leg sometimes in the veins of the pelvis and this is a great concern because the clot may dislodge travelling with the flow of blood into the right side of the heart and from there into the lung. When we re travelling on long haul flights several things happen. First of all we re stationery. We re not moving our legs so there s no physiological compression of the calf muscles. Blood tends to sit in the veins and may clot. Number two the environment is dry. We dehydrate we may drink some alcohol. We dehydrate even further. Alcohol s a diuretic agent and it results in us actually drying out and that makes the blood a little bit thicker and stickier and these factors lead to clotting. Sometimes in perhaps particularly the economy section of an aeroplane we may be a little bit cramped and our leg may be slightly compressed on the seat. This could further prevent blood flow back to the heart and trap blood in the leg where clotting may occur. Dr Crantock was talking about things that that could happen may happen or perhaps will happen in the future. Perhaps is an adverb. It is a word like maybe or possibly. It gives a statement the sense that the speaker is not sure if the thing will happen. Perhaps I will means the same as possibly I will or maybe I will . May and could are modal verbs. May has a number of meanings. The most common use is when you

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