腔静脉把血从身体的上部和下部抽光然后流入心脏的右心房的两支大静脉之一 Either of two large veins that drain blood from the upper body and from the lower body and empty into the right atrium of the heart.
这城市在发展，市中心房地产越来越值钱。 The city is growing and property in the centre is becoming more valuable.
