at first有什么同义词

at first :
originally
in the beginning
at the outset
at last:at length
bitter end
eventually
finally
in conclusion
in the end
lastly
omega
ultimately
再问： 大姐，只说点通俗、常用的好不好，这么多我看不懂啊！
再答： at first :起初 in the beginning at last:最后 in the end 最常用的！