后前位片,左缘上方向外突起的为___________,其下方为__________,此处向内凹入,故称_______,肺动脉与左心室缘之间为__________,然后向内,转弯处称________。
— What would you like to have, meat or fish?
— _____________________.
— ___________________
— Once or twice a week.
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