They just wait, they wait for their time, they wait until you are in danger from a particular antigen.
它们时刻准备着,在等待着那一刻,等待你被某种特别的抗原威胁的时刻
A team of surgeons is working to harvest an organ at one site while another team of surgeons is working to prepare the recipient at another site, and the organ is flown there.
一组外科医生,将器官从供体取出的同时,另一组医生在另一个地方,为移植手术做准备,等待器官空运过去
If you could look inside a pre-synaptic axon terminal, you would find one of the characteristics is that it's loaded with these vesicles and they're just sitting there waiting to receive an action potential so that they can immediately dump their contents.
如果你能够一窥突触前的轴突末梢内部,你将会发现一个共同特征,神经递质都装载在小泡中,时刻准备着等待动作电位激活,以便迅速释放其内含物
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