Those concerns were overshadowed by subsequent events.是什么意思？

Those concerns were overshadowed by subsequent events.

随后发生的事使之前所关注的那些问题显得无足轻重。

those

adj.& pron. that的复数；adj. 那些的，那；n. 那，那个( that的名词复数)，（指较远的人或事物）那，（指已提到过或已知的人或事物）那，（特指）那；

例句
We shall strike hard, without flinching, at terrorists and those who abet them.
我们要毫不退缩地严厉打击恐怖分子及其帮凶。

concerns

n. 关系( concern的名词复数 )，关心，企业，（与某人）有关的事；

例句
All his concerns were centred around himself rather than Rachel...
他所关心的全是他自己，而不是雷切尔。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

overshadowed

v. 使（某物）被遮暗( overshadow的过去式和过去分词 )，使阴暗，使（某事物）令人不快或减少乐趣，使（某人）相形见绌或黯然失色；

例句
His triumph was overshadowed by an uneasy sense of foreboding.
他的胜利因为一种令人不安的不祥预感蒙上了阴影。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

subsequent

adj. 后来的，随后的，作为结果而发生的，附随的；

例句
He made numerous errors of fact and was torn to pieces during the subsequent question time...
他犯了数不清的事实错误，并在随后的答疑时间中被批得体无完肤。

events

n. 事件，事件，大事( event的名词复数 )，运动项目；

例句
Recent events have made his central theme even more apposite...
新近发生的事情使得他的中心主题显得更加有的放矢。