These helper T-cells produce small signaling molecules called cytokines, which activate B-cells and macrophages.

辅助T细胞会产生些小分子，即细胞因子，激活B细胞和巨噬细胞。

The brain signal is a very, very small signal and muscle activity is very strong signal.

大脑个非常非常小，而肌肉活个非常强。

At least in New England, we're seeing a small but important signal that conservation leads to job growth.

至少在新英格兰地区，我们看到了个微小但很重要，即保护环境会带来就业增长。

I have always been fascinated with how small electrical signals in discrete parts of the brain lead to big behavioral changes.

我直对大脑离散部分小电如何导致巨大行为变化着迷。

A telephone breakdown in America is a rare thing, and this was the moment when a small danger signal might have shrilled in Bond's mind.

在美国，电话故障罕见，此时邦德脑海中可能闪过个小小危险。

The sympathetic nervous system is set up in such a way that even a small stress signal sent down one path could trigger a response in many effectors at once.

交感神经系统这样建立，即使沿着条路径发出微小压力也能同时触发许多效应器反应。