The accurate estimation of wind and earthquake loads is a very difficult matter.

准确估计风荷载和地震荷载是非常困难的。

youdao

As a matter of fact, it is often very difficult for adoptees to find out about their birth parents because the birth records of most adoptees are usually sealed.

事实上，被收养者往往很难找到他们的亲生父母，因为大多数被收养者的出生记录通常是被封存的。

youdao

I had thought the head was the most difficult part of the matter—oh!

我原以为脑袋才是最难过铁栅栏的——啊！

youdao

Where to direct the anger and the blame is a more difficult matter.

FORBES: Sicko's Shortcuts

Ms Godfrey, however, said the intermittent nature of the technical issues reported by some schools made this a difficult matter to resolve.

BBC: Education Committee

So it was a difficult matter, but if you really peeled of the onion, so to speak, you saw that hey, this is not exactly what it appears to be.

BBC: [an error occurred while processing this directive]