We have come to relaize that only by keeping on learning can

“only + 状语”放在句首时,主谓需要倒装.
这句话就是：We have come to relaize that we keep up with the advancing socienty only by keeping on learning.
当含有否定意义的词或短语放在句首时,要倒装.这类词包括：
not,never,neither,seldom,little,nowhere,hardly,scarcely,rarely,no longer,not until,at no time,by no means,on no account,in no case,under no circumstances,on no account,not only … but also…
就是些倒装句 分析透了没什么