As a scientist, I'm searching for a biological basis of gender.

作为一名科学家， 我正在寻找性别的生物学基础。

There are many neuroscience-based theories that describe the biological basis of consciousness.

有许多基于神经科学的理论描述了意识的生物学基础。

There's a pretty established theory of risk taking – the biological basis of risk taking which is that two different systems in the brain developed at different rates.

目前关于青少年热爱冒险有一个广为人们接受的理论，即其生物学基础。 大脑中有两个发育速度不同的系统。

When people learn that I'm a woman who happens to be transgender, they always ask, " How do you know you're a woman? " As a scientist, I'm searching for a biological basis of gender.

当人们知道我恰巧是一个变性女人时，他们总是会问，“你怎么知道你是个女人的？”作为一名科学家，我正在寻找性别的生物学依据。