which could signal autoimmune disease. 很可能是自身免疫病的信♥号♥♥...
...the dholes wait for the signal to attack. 豺群在等待进攻的信号
No, no signal yet. 还没收到信号
But the signal from one of the females 然而其中一只雌性鬃狼的信号
the fishermen beat out a warning signal. 渔民们发出了警告信号