本来

originally

original

at first

it goes without saying

of course

essentially

to begin with

本来[běnlái]

-（原有的）original:
originalmeaning;originalintention;本来的意思
thedialecticsinherentinthings事物本来的辩证法
-（原先;先前）originally;atfirst:-（理所当然）itgoeswithoutsaying;ofcourse;naturally:

太阳是能量的最基本来源。
The sun is the ultimate source of energy.

酗酒令人如此糊涂。而人本来就是糊涂，所以酗酒无非就等于是以罚款免人重罪罢了。
Drinking make such fool of people, and people is such fool to begin with, that it's compound a felony.

这套房间本来是准备给5口人住的。
The apartment was originally meant for five.

他本来不必买这样一所大房子。
He originally need not buy such big house.

这房子本来的主人是威灵顿公爵。
The original owner of the house was the Duke of Wellington.