One major obstacle the school discovered, and one that is difficult to surmount, is timing.
Sometimes, of course, this is because of obstacles that are difficult to surmount – long distances, or family estrangements.
But it's difficult to surmount the historic tensions that some minority groups perceive between racial justice and the very institution of policing.
Though America unquestionably offers temptations -- a vibrant expat artist scene, women more alluring than his reviled wife, an opportunity to see his poems translated to English -- his inexplicable affinity for Odessa is difficult to surmount.
Lewis looked at interaction patterns of 126,134 users on the site, and although there aren't comparable figures for Tinder, he concluded that "racial bias in assortative mating is a robust and ubiquitous social phenomenon, and one that is difficult to surmount even with small steps in the right direction.
However most believe the financial and legal impediments to full replacement are difficult to surmount.
Unfortunately, anaerobic fermentation has inherent disadvantages, for example, long doubling time, slow carbon throughput, and low product formation rates, that are difficult to surmount [ 63].
What can be more difficult to surmount are attitudinal blocks, in that blended learning challenges the status quo and can be perceived as collapsing the integrity of the traditional academy.
First, the intrinsic uncertainty surrounding any investment project puts the borrower's ability to repay in question; second, the borrower's fragile promise to obey the contract can be more difficult to surmount.
Several others proved too controversial to work through in a few months (e.g. middle class flat tax) or presented legal/other hurdles that we decided were too difficult to surmount (e.g. Reform Authority and the special interests tax).
