then the energy spared from looking after the gut was made available to the brain...多余的能量就不用供給胃部直接供給腦部了...
spare ... from使某人免受(不愿意之事)
I'll spare you from having to apologize formally.
我將省去你的正式道歉。
The doctor tried to spare him from pain.
大夫設法使他免受疼痛。
available to可以用來(可能得到的;現有的)
Our aim is to make books available to all.
我們的目的是使大家都能看得到書。
My mom is available to baby-sit this weekend.
我媽媽在這個周末可以照顧小寶寶。