The book takes on a number of difficult technical challenges.
"We're still catching our breath after a very difficult, technical excavation," said Houston.
The most difficult technical problem facing the V-2 was achieving maximum range.
"My challenge is continuing to build the company through difficult technical changes," Ms. Whiting said in an interview last week.
Years of patient and persistent diplomacy, and difficult technical work, have borne fruit as we now implement the deal.
"Today, it was a difficult, technical finish — there was wind on both sides and lot of bashing".
For Hare, the other major problem is that separating "metadata" from "content", as the law mandates for the purposes of mass surveillance, is a very difficult technical challenge.
The agreement calls for archaeological integrity -- a difficult technical feat at such depths and a goal that critics of for-profit archaeology are likely to dispute.
With its cascade of Spanish dances and difficult technical passages, "Paquita" embodied Romantic ballet's fascination with Spanish dancing and its vogue for Gypsy heroines.
I felt pretty disenfranchised from science at school: it wasn't until I discovered science fiction that I realised I could understand "difficult" technical concepts.
But the longer-range effort will be finding ways to detect, track and counter the miniature submarines, which he called "a very difficult technical, tactical problem".
