That hurdle was overcome by adding a small amount of brainfluid to the petri dish used to grow them.
这个障碍已经被克服，通过加入少量的脑液到培养皿用于种植。
2
The spaces between these membranes are filled with fluid that cushions the brain and keeps it from being damaged by contact with the inside of the skull.
在脑（脊）膜之间的空间里充满了液体可以缓和大脑的冲击并防止因为接触到内部颅骨而受损害。
3
We also know vitamin D activates and deactivates enzymes in the brain and the cerebrospinal fluid that are involved in neurotransmitter synthesis and nerve growth.