ADJ (of birds and mammals) having a four-chambered heart, which enables two separate circulations and prevents mixing of the arterial and venous blood (鸟和哺乳动物)双心的
ADJ（形容词） (of birds and mammals) having a four-chambered heart, which enables two separate circulations and prevents mixing of the arterial and venous blood (鸟和哺乳动物)双心的