就像白细胞那样，向受到感染的部位发起攻击。

They attack like white blood cells fighting an infection.

youdao

原因在于由血液向脑细胞提供色氨酸的机制。

This same mechanism also provides the brain cells.

youdao

原因在于由血液向脑细胞提供色氨酸的机制。

This same mechanism also provides the brain cells.

youdao