Central to the story of vertebrate evolution is the origin of the vertebrate head, a problem difficult to approach using paleontology and comparative morphology due to a lack of unambiguous intermediate forms.
Marc Ambinder, associate editor of The Atlantic, said of Lu, "when agency heads have a problem, or when the White House has a problem with an agency head, Mr. Lu will be the first person who's called, or calls".
With the changing complexity of the grid, we're heading for a problem".
Intimidation was another problem raised, and one sex worker cited "clients that mess with your head" as a problem.
He had the stamina, he had technique, he had a good shot, only his heading was a problem.
To head off a problem, he has a meter, a Dexcom Seven Plus, that reads his blood sugar from a wireless sensor with a lead inserted under his skin.
In his legislative proposals and executive actions announced Wednesday, the president and Vice President Biden showed a willingness to confront a difficult problem head-on — a problem that is not only about laws but also about culture and mental-health care.
Mr. Barnett is keen to head off a problem in the billionaires' club over all the work crews and noise — especially since he knows that custom finishing work for billionaires can go on for two or more years.
"If we act today, we could head off a problem that will be 20percentt of the greenhouse gas problem by 2050". These emissions come from many sources and have different effects on climate, but eliminating them could delay warming by as many as 40 years, according to Durwood Zaelke, president of the Institute for Governance and Sustainable Development, a Washington-based nonprofit organization.
That stuck in my head as a problem that would never go away".
