1·Then, when the blood runs low on calcium, a signaling device called the parathyroid gland can activate a process by which calcium is taken from the skeleton and put back into the blood.
那么，当流动的血液中钙含量过低，一个叫做甲状旁腺的发信号装置就会激活一个流程，致使骨骼中的钙流失到血液里。
2·It would be better, I thought, to see networks of neurons signaling to each other.
我想，最好是去了解神经元彼此发信号的网络。
3·To make a signaling or summoning gesture.
做一个发信号或召唤的姿势。
4·With ISDN service, signaling that must be conveyed between the user station and the local switch is carried on a separate digital channel called the D channel.
与必须表达在用户驻地和本地开关之间的ISDN服务，发信号继续称D渠道的一条分开的数字通道。