因此，如何处理涤纶树脂和其他塑料的废弃物一直是一个令人头疼的问题。

So it has always been a headache to deal with the waste from PET and other plastics.

他把读书当成件令人头疼的事。

He regarded reading as a headache.

比较不同年代的巨星最令人头疼了。

Comparing players of different generations is difficult at best.

同卵双生之间的比较已经够令人头疼.

Comparisons are tough enough on identical twins.

宴请、礼物和其他类似的索贿最令人头疼。

“Requests for hospitality, gifts and similar favors are among the most difficult areas, ” she said.

关注一个绝症患儿的令人头疼案子结束了。

A fraught case over the care of a desperately ill baby comes to a close.

你可以加上他们欣赏的功能，让那些令人头疼的人高兴。

You can please someone who's a pain by adding their pet feature.

交通堵塞长期以来一直是该城市令人头疼的问题。

Traffic jam has long been an age old headache/ has been a long standing headache.

拉镖如果遇上一群高手来抢确实是一件令人头疼的事。

La dart case is really taking away a group of experts is a matter of headache.

他要与那些令人头疼的对手一一过招，就必须随机应变。

He's fighting each opponent that brings a different problem to the table and he's gotta adapt.